ASIO 70th Anniversary 2019 50c Uncirculated Coin: Coincryption Competition

decrypt.py

# this code is shit 💩
# and probably more unreadable than ths cipher 😅

import string
COIN = ['UWGJM', 'MNLQH', 'DFREA', 'JZLHI', 'GGHHQ', 'UTUJN', 'GNKYF', 'VNVLQ',
        'MZZRQ', 'TLBTA', 'OSZHU', 'PKWKV', 'FZDTX', 'VTYGV', 'UIOKQ', 'IYQNU',
        'TWUWB', 'DYOLF', 'AXMPD', 'GMRTY', 'NZGIS', 'GUQXN', 'AEOMI', 'HWBKE']

OTP = ['MWPZJ', 'FUBVM', 'FQICV', 'ZTAFD',
       'ZCZLJ', 'SNYMT', 'CSXIG', 'ZTXKJ',
       'TIHRJ', 'VGYTK', 'HTLHB', 'WYHLW',
       'OTDYY', 'NFHCB', 'BESIJ', 'EMSYM',
       'CBMVL', 'QIEKC', 'VATTO', 'APUBB',
       'SIAAH', 'IXJCZ', 'WNSVC', 'OPJER',
       'LRXPZ', 'GNWSD', 'UUVUK', 'ECAUL',
       'ZBMHI', 'OCJGO', 'JNXSZ', 'PKGQE',
       'GTSFM', 'UPATX', 'WAOID', 'XXFML',
       'AUHRV', 'ETGMS', 'ZTMVQ', 'XJFPM',
       'GIMZQ', 'WDCUC', 'LLZGO', 'BPPPB',
       'LDMOE', 'AKJWW', 'BMYMO', 'PFFSD',
       'TYMZU', 'DDWIE', 'WFZAM', 'QVMPS',
       'AXIVS', 'OBAUW', 'RXHUD', 'QWKZZ',
       'WLJYB', 'NGHGI', 'HKWCT', 'FDEPT',
       'GCWFN', 'TIHOD', 'FSKEB', 'IKDSU',
       'PFEFX', 'KPTLM', 'RTLTQ', 'LKYLJ',
       'DQCZK', 'WLYNS', 'PHHJW', 'WMHSR',
       'VWPJD', 'VFUKI', 'UQTAB', 'XVKOH',
       'FLDNN', 'RSRLK', 'ETDAX', 'RZWMT']


def one_time_pad_conversion_table(n):
    return lambda s: s.translate(str.maketrans(
        string.ascii_uppercase,
        string.ascii_uppercase[n:] + string.ascii_uppercase[:n]))


for coinBlockIndex, coinBlock in enumerate(COIN):
    for coinLetterIndex, coinLetter in enumerate(coinBlock):
        trans = one_time_pad_conversion_table(
            string.ascii_uppercase[::-1].index(coinLetter) + 1)
        (string.ascii_uppercase)[::-1]
        print(trans[string.ascii_uppercase.index(
            OTP[coinBlockIndex][coinLetterIndex])], end='')