@konfirm/iso7064 (npm): ISO/IEC 7064:2003 - Check character systems 
Keywords: iso|7064|mod|modulus|modulo|iso-7064|11_2|11-2|11_10|11,10|27_26|27,26|37_2|37-2|37_36|37,36|97_10|97-10|661_26|661-26|1271_36|1271-36