OMITTED PREFIXES
1958-63: AS,BS,CC,CT,DC,DP,DT.
1964-70: AS,BS,CC,CT,DC,DD,DP,FF,FL,FT,GE,GG,GL,HA,HE,HL,JL,JP,
JU,KP,LA-LZ,MA,MD,ML,MP,NG,NP,NV,PA,PC,PE,PG.
1971-75: AH,AK,AS,BM,BS,CC,CT,CV,DC,DD,DL,DP,DT,DU,DV.
1976-82 AAA-DLN: AAS,ALE,ANT,ASB,ASE,ASK,ASS,BAD,BAG,BAN,BAT,BED,
BEE,BEG,BUB,BUG,BUN,BUS,BUT,CAB,CAD,CAN,CAT,
CCA-CCX,CDN,CEX,CNT,DBK,DBL,DBN,DDT,DED,DEW.
