a-a a-b a-c a-z aaa aab aac aam aar aay aaz ab- aba abb abc abm abr aby abz ac- aca acb acc acm acr acy acz ama amb amc amm amr amy amz ar- ara arb arc arm arr ary arz ay- aya ayc ayr ayz az- aza azb azm azy azz baa bab bac bam bar bay baz bba bbb bbc bbm bbr bby bca bcb bcc bcm bcr bcy bcz bma bmb bmc bmm bmr bmz bra brb brm brr bry brz by- bya byc bym byr byz bza bzr bzz c-- caa cab cac cam car cay caz cba cbb cbc cbm cbr cby cbz cca ccb ccc ccm ccr ccz cma cmb cmc cmm cmr cmy cra crb crc crm crr cry crz cya cyb cyc cym cyr cz- czc czm m-r maa mab mac mam mar may maz mba mbb mbc mbm mbr mc- mca mcb mcc mcm mcr mcz mma mmb mmc mmm mmr mmz mra mrb mrc mrm mrr mry mrz my- mya myb myc mym myr mza mzb mzm ra- raa rab rac ram rar ray raz rba rbb rbc rbm rbr rca rcb rcc rcm rcr rma rmb rmc rmm rmr rra rrb rrc rrm rrr ry- rya ryc rym ryr ryy ryz rza rzb rzm rzy yaa yab yac yam yar yay yaz ybc ybm ybr yby ybz yca ycc ycy yma ymc ymm yra yrc yyb yyc yyy yyz yzb yzr yzy zaa zab zac zam zar zay zaz zbb zbc zbm zbr zby zma zmb zmc zmm zym zzr zzy zzz