a-a a-b a-i a-t aaa aab aai aam aao aas aat ab- aba abb abi abm abo abs abt ai- aia aib aii aim aio ais ait ama amb ami amm amo ams amt aoa aob aoi aom aoo aos aot as- asa asb asi asm aso ass ast at- ata atb ati atm ato ats att baa bab bai bam bao bas bat bba bbb bbi bbm bbo bbs bbt bi- bia bib bii bim bio bis bit bma bmb bmi bmm bmo bms bmt boa bob boi bom boo bos bot bsa bsb bsi bsm bso bss bst bta btb bti btm bto bts btt ia- iaa iab iai iam iao ias iat iba ibb ibi ibm ibo ibs ibt iia iib iii iim iio iis iit im- ima imb imi imm imo ims imt io- ioa iob ioi iom ioo ios iot is- isa isb isi ism iso iss ist ita itb iti itm ito its itt m-o maa mab mai mam mao mas mat mba mbb mbi mbm mbo mbs mbt mi- mia mib mii mim mio mis mit mma mmb mmi mmm mmo mms mmt moa mob moi mom moo mos mot msa msb msi msm mso mss mst mta mtb mti mtm mto mts mtt o-i oaa oab oai oam oao oas oat ob- oba obb obi obm obo obs obt oia oib oii oim oio ois oit om- oma omb omi omm omo oms omt oo- ooa oob ooi oom ooo oos oot os- osa osb osi osm oso oss ost ot- ota otb oti otm oto ots ott saa sab sai sam sao sas sat sba sbb sbi sbm sbo sbs sbt sia sib sii sim sio sis sit sma smb smi smm smo sms smt soa sob soi som soo sos sot ss- ssa ssb ssi ssm sso sss sst sta stb sti stm sto sts stt taa tab tai tam tao tas tat tba tbb tbi tbm tbo tbs tbt tia tib tii tim tio tis tit tma tmb tmi tmm tmo tms tmt to- toa tob toi tom too tos tot tsa tsb tsi tsm tso tss tst tta ttb tti ttm tto tts ttt