SELECT currency_out('AED');
 currency_out 
--------------
 AED
(1 row)

SELECT currency_out('AFN');
 currency_out 
--------------
 AFN
(1 row)

SELECT currency_out('ALL');
 currency_out 
--------------
 ALL
(1 row)

SELECT currency_out('AMD');
 currency_out 
--------------
 AMD
(1 row)

SELECT currency_out('ANG');
 currency_out 
--------------
 ANG
(1 row)

SELECT currency_out('AOA');
 currency_out 
--------------
 AOA
(1 row)

SELECT currency_out('ARS');
 currency_out 
--------------
 ARS
(1 row)

SELECT currency_out('AUD');
 currency_out 
--------------
 AUD
(1 row)

SELECT currency_out('AWG');
 currency_out 
--------------
 AWG
(1 row)

SELECT currency_out('AZN');
 currency_out 
--------------
 AZN
(1 row)

SELECT currency_out('BAM');
 currency_out 
--------------
 BAM
(1 row)

SELECT currency_out('BBD');
 currency_out 
--------------
 BBD
(1 row)

SELECT currency_out('BDT');
 currency_out 
--------------
 BDT
(1 row)

SELECT currency_out('BGN');
 currency_out 
--------------
 BGN
(1 row)

SELECT currency_out('BHD');
 currency_out 
--------------
 BHD
(1 row)

SELECT currency_out('BIF');
 currency_out 
--------------
 BIF
(1 row)

SELECT currency_out('BMD');
 currency_out 
--------------
 BMD
(1 row)

SELECT currency_out('BND');
 currency_out 
--------------
 BND
(1 row)

SELECT currency_out('BOB');
 currency_out 
--------------
 BOB
(1 row)

SELECT currency_out('BRL');
 currency_out 
--------------
 BRL
(1 row)

SELECT currency_out('BSD');
 currency_out 
--------------
 BSD
(1 row)

SELECT currency_out('BTN');
 currency_out 
--------------
 BTN
(1 row)

SELECT currency_out('BWP');
 currency_out 
--------------
 BWP
(1 row)

SELECT currency_out('BYN');
 currency_out 
--------------
 BYN
(1 row)

SELECT currency_out('BYR');
 currency_out 
--------------
 BYR
(1 row)

SELECT currency_out('BZD');
 currency_out 
--------------
 BZD
(1 row)

SELECT currency_out('CAD');
 currency_out 
--------------
 CAD
(1 row)

SELECT currency_out('CDF');
 currency_out 
--------------
 CDF
(1 row)

SELECT currency_out('CHF');
 currency_out 
--------------
 CHF
(1 row)

SELECT currency_out('CLP');
 currency_out 
--------------
 CLP
(1 row)

SELECT currency_out('CNY');
 currency_out 
--------------
 CNY
(1 row)

SELECT currency_out('COP');
 currency_out 
--------------
 COP
(1 row)

SELECT currency_out('CRC');
 currency_out 
--------------
 CRC
(1 row)

SELECT currency_out('CUC');
 currency_out 
--------------
 CUC
(1 row)

SELECT currency_out('CUP');
 currency_out 
--------------
 CUP
(1 row)

SELECT currency_out('CVE');
 currency_out 
--------------
 CVE
(1 row)

SELECT currency_out('CZK');
 currency_out 
--------------
 CZK
(1 row)

SELECT currency_out('DJF');
 currency_out 
--------------
 DJF
(1 row)

SELECT currency_out('DKK');
 currency_out 
--------------
 DKK
(1 row)

SELECT currency_out('DOP');
 currency_out 
--------------
 DOP
(1 row)

SELECT currency_out('DZD');
 currency_out 
--------------
 DZD
(1 row)

SELECT currency_out('EGP');
 currency_out 
--------------
 EGP
(1 row)

SELECT currency_out('ERN');
 currency_out 
--------------
 ERN
(1 row)

SELECT currency_out('ETB');
 currency_out 
--------------
 ETB
(1 row)

SELECT currency_out('EUR');
 currency_out 
--------------
 EUR
(1 row)

SELECT currency_out('FJD');
 currency_out 
--------------
 FJD
(1 row)

SELECT currency_out('FKP');
 currency_out 
--------------
 FKP
(1 row)

SELECT currency_out('GBP');
 currency_out 
--------------
 GBP
(1 row)

SELECT currency_out('GEL');
 currency_out 
--------------
 GEL
(1 row)

SELECT currency_out('GGP');
 currency_out 
--------------
 GGP
(1 row)

SELECT currency_out('GHS');
 currency_out 
--------------
 GHS
(1 row)

SELECT currency_out('GIP');
 currency_out 
--------------
 GIP
(1 row)

SELECT currency_out('GMD');
 currency_out 
--------------
 GMD
(1 row)

SELECT currency_out('GNF');
 currency_out 
--------------
 GNF
(1 row)

SELECT currency_out('GTQ');
 currency_out 
--------------
 GTQ
(1 row)

SELECT currency_out('GYD');
 currency_out 
--------------
 GYD
(1 row)

SELECT currency_out('HKD');
 currency_out 
--------------
 HKD
(1 row)

SELECT currency_out('HNL');
 currency_out 
--------------
 HNL
(1 row)

SELECT currency_out('HRK');
 currency_out 
--------------
 HRK
(1 row)

SELECT currency_out('HTG');
 currency_out 
--------------
 HTG
(1 row)

SELECT currency_out('HUF');
 currency_out 
--------------
 HUF
(1 row)

SELECT currency_out('IDR');
 currency_out 
--------------
 IDR
(1 row)

SELECT currency_out('ILS');
 currency_out 
--------------
 ILS
(1 row)

SELECT currency_out('IMP');
 currency_out 
--------------
 IMP
(1 row)

SELECT currency_out('INR');
 currency_out 
--------------
 INR
(1 row)

SELECT currency_out('IQD');
 currency_out 
--------------
 IQD
(1 row)

SELECT currency_out('IRR');
 currency_out 
--------------
 IRR
(1 row)

SELECT currency_out('ISK');
 currency_out 
--------------
 ISK
(1 row)

SELECT currency_out('JEP');
 currency_out 
--------------
 JEP
(1 row)

SELECT currency_out('JMD');
 currency_out 
--------------
 JMD
(1 row)

SELECT currency_out('JOD');
 currency_out 
--------------
 JOD
(1 row)

SELECT currency_out('JPY');
 currency_out 
--------------
 JPY
(1 row)

SELECT currency_out('KES');
 currency_out 
--------------
 KES
(1 row)

SELECT currency_out('KGS');
 currency_out 
--------------
 KGS
(1 row)

SELECT currency_out('KHR');
 currency_out 
--------------
 KHR
(1 row)

SELECT currency_out('KMF');
 currency_out 
--------------
 KMF
(1 row)

SELECT currency_out('KPW');
 currency_out 
--------------
 KPW
(1 row)

SELECT currency_out('KRW');
 currency_out 
--------------
 KRW
(1 row)

SELECT currency_out('KWD');
 currency_out 
--------------
 KWD
(1 row)

SELECT currency_out('KYD');
 currency_out 
--------------
 KYD
(1 row)

SELECT currency_out('KZT');
 currency_out 
--------------
 KZT
(1 row)

SELECT currency_out('LAK');
 currency_out 
--------------
 LAK
(1 row)

SELECT currency_out('LBP');
 currency_out 
--------------
 LBP
(1 row)

SELECT currency_out('LKR');
 currency_out 
--------------
 LKR
(1 row)

SELECT currency_out('LRD');
 currency_out 
--------------
 LRD
(1 row)

SELECT currency_out('LSL');
 currency_out 
--------------
 LSL
(1 row)

SELECT currency_out('LTL');
 currency_out 
--------------
 LTL
(1 row)

SELECT currency_out('LYD');
 currency_out 
--------------
 LYD
(1 row)

SELECT currency_out('MAD');
 currency_out 
--------------
 MAD
(1 row)

SELECT currency_out('MDL');
 currency_out 
--------------
 MDL
(1 row)

SELECT currency_out('MGA');
 currency_out 
--------------
 MGA
(1 row)

SELECT currency_out('MKD');
 currency_out 
--------------
 MKD
(1 row)

SELECT currency_out('MMK');
 currency_out 
--------------
 MMK
(1 row)

SELECT currency_out('MNT');
 currency_out 
--------------
 MNT
(1 row)

SELECT currency_out('MOP');
 currency_out 
--------------
 MOP
(1 row)

SELECT currency_out('MRO');
 currency_out 
--------------
 MRO
(1 row)

SELECT currency_out('MUR');
 currency_out 
--------------
 MUR
(1 row)

SELECT currency_out('MVR');
 currency_out 
--------------
 MVR
(1 row)

SELECT currency_out('MWK');
 currency_out 
--------------
 MWK
(1 row)

SELECT currency_out('MXN');
 currency_out 
--------------
 MXN
(1 row)

SELECT currency_out('MYR');
 currency_out 
--------------
 MYR
(1 row)

SELECT currency_out('MZN');
 currency_out 
--------------
 MZN
(1 row)

SELECT currency_out('NAD');
 currency_out 
--------------
 NAD
(1 row)

SELECT currency_out('NGN');
 currency_out 
--------------
 NGN
(1 row)

SELECT currency_out('NIO');
 currency_out 
--------------
 NIO
(1 row)

SELECT currency_out('NOK');
 currency_out 
--------------
 NOK
(1 row)

SELECT currency_out('NPR');
 currency_out 
--------------
 NPR
(1 row)

SELECT currency_out('NZD');
 currency_out 
--------------
 NZD
(1 row)

SELECT currency_out('OMR');
 currency_out 
--------------
 OMR
(1 row)

SELECT currency_out('PAB');
 currency_out 
--------------
 PAB
(1 row)

SELECT currency_out('PEN');
 currency_out 
--------------
 PEN
(1 row)

SELECT currency_out('PGK');
 currency_out 
--------------
 PGK
(1 row)

SELECT currency_out('PHP');
 currency_out 
--------------
 PHP
(1 row)

SELECT currency_out('PKR');
 currency_out 
--------------
 PKR
(1 row)

SELECT currency_out('PLN');
 currency_out 
--------------
 PLN
(1 row)

SELECT currency_out('PYG');
 currency_out 
--------------
 PYG
(1 row)

SELECT currency_out('QAR');
 currency_out 
--------------
 QAR
(1 row)

SELECT currency_out('RON');
 currency_out 
--------------
 RON
(1 row)

SELECT currency_out('RSD');
 currency_out 
--------------
 RSD
(1 row)

SELECT currency_out('RUB');
 currency_out 
--------------
 RUB
(1 row)

SELECT currency_out('RWF');
 currency_out 
--------------
 RWF
(1 row)

SELECT currency_out('SAR');
 currency_out 
--------------
 SAR
(1 row)

SELECT currency_out('SBD');
 currency_out 
--------------
 SBD
(1 row)

SELECT currency_out('SCR');
 currency_out 
--------------
 SCR
(1 row)

SELECT currency_out('SDG');
 currency_out 
--------------
 SDG
(1 row)

SELECT currency_out('SEK');
 currency_out 
--------------
 SEK
(1 row)

SELECT currency_out('SGD');
 currency_out 
--------------
 SGD
(1 row)

SELECT currency_out('SHP');
 currency_out 
--------------
 SHP
(1 row)

SELECT currency_out('SLL');
 currency_out 
--------------
 SLL
(1 row)

SELECT currency_out('SOS');
 currency_out 
--------------
 SOS
(1 row)

SELECT currency_out('SPL');
 currency_out 
--------------
 SPL
(1 row)

SELECT currency_out('SRD');
 currency_out 
--------------
 SRD
(1 row)

SELECT currency_out('STD');
 currency_out 
--------------
 STD
(1 row)

SELECT currency_out('SVC');
 currency_out 
--------------
 SVC
(1 row)

SELECT currency_out('SYP');
 currency_out 
--------------
 SYP
(1 row)

SELECT currency_out('SZL');
 currency_out 
--------------
 SZL
(1 row)

SELECT currency_out('THB');
 currency_out 
--------------
 THB
(1 row)

SELECT currency_out('TJS');
 currency_out 
--------------
 TJS
(1 row)

SELECT currency_out('TMT');
 currency_out 
--------------
 TMT
(1 row)

SELECT currency_out('TND');
 currency_out 
--------------
 TND
(1 row)

SELECT currency_out('TOP');
 currency_out 
--------------
 TOP
(1 row)

SELECT currency_out('TRY');
 currency_out 
--------------
 TRY
(1 row)

SELECT currency_out('TTD');
 currency_out 
--------------
 TTD
(1 row)

SELECT currency_out('TVD');
 currency_out 
--------------
 TVD
(1 row)

SELECT currency_out('TWD');
 currency_out 
--------------
 TWD
(1 row)

SELECT currency_out('TZS');
 currency_out 
--------------
 TZS
(1 row)

SELECT currency_out('UAH');
 currency_out 
--------------
 UAH
(1 row)

SELECT currency_out('UGX');
 currency_out 
--------------
 UGX
(1 row)

SELECT currency_out('USD');
 currency_out 
--------------
 USD
(1 row)

SELECT currency_out('UYU');
 currency_out 
--------------
 UYU
(1 row)

SELECT currency_out('UZS');
 currency_out 
--------------
 UZS
(1 row)

SELECT currency_out('VEF');
 currency_out 
--------------
 VEF
(1 row)

SELECT currency_out('VND');
 currency_out 
--------------
 VND
(1 row)

SELECT currency_out('VUV');
 currency_out 
--------------
 VUV
(1 row)

SELECT currency_out('WST');
 currency_out 
--------------
 WST
(1 row)

SELECT currency_out('XAF');
 currency_out 
--------------
 XAF
(1 row)

SELECT currency_out('XCD');
 currency_out 
--------------
 XCD
(1 row)

SELECT currency_out('XDR');
 currency_out 
--------------
 XDR
(1 row)

SELECT currency_out('XOF');
 currency_out 
--------------
 XOF
(1 row)

SELECT currency_out('XPF');
 currency_out 
--------------
 XPF
(1 row)

SELECT currency_out('YER');
 currency_out 
--------------
 YER
(1 row)

SELECT currency_out('ZAR');
 currency_out 
--------------
 ZAR
(1 row)

SELECT currency_out('ZMW');
 currency_out 
--------------
 ZMW
(1 row)

SELECT currency_out('ZWD');
 currency_out 
--------------
 ZWD
(1 row)

SELECT currency_out('ZZZ');
ERROR:  unknown currency type: ZZZ
LINE 1: SELECT currency_out('ZZZ');
                            ^