a-a a-b a-t aaa aab aak aam aao aas aat ab- aba abb abk abm abo abs abt aka akb akk akm ako aks ama amb amk amm amo ams amt aoa aob aok aom aoo aos aot as- asa asb ask asm aso ass ast at- ata atb atm ato ats att baa bab bak bam bao bas bat bba bbb bbk bbm bbo bbs bbt bka bkb bkk bkm bko bks bkt bma bmb bmk bmm bmo bms bmt boa bob bok bom boo bos bot bsa bsb bsk bsm bso bss bst bta btb btk btm bto bts btt k-t ka- kaa kab kak kam kao kas kat kba kbb kbk kbm kbo kbs kkb kkk kkm kks kkt kma kmb kmk kmm kmo kms kmt koa kob kok kom koo kos kot ksa ksb ksk ksm kso kss kst kta ktb ktk ktm kto kts ktt m-o maa mab mak mam mao mas mat mba mbb mbk mbm mbo mbs mbt mka mkb mkk mkm mko mks mkt mma mmb mmk mmm mmo mms mmt moa mob mok mom moo mos mot msa msb msk msm mso mss mst mta mtb mtk mtm mto mts mtt oaa oab oak oam oao oas oat ob- oba obb obk obm obo obs obt oka okb okk oko oks om- oma omb omm omo oms omt oo- ooa oob ook oom ooo oos oot os- osa osb osk osm oso oss ost ot- ota otb otk otm oto ots ott saa sab sak sam sao sas sat sba sbb sbk sbm sbo sbs sbt sk- ska skb skk skm sko sks skt sma smb smk smm smo sms smt soa sob sok som soo sos sot ss- ssa ssb ssk ssm sso sss sst sta stb stk stm sto sts stt taa tab tak tam tao tas tat tba tbb tbk tbm tbo tbs tbt tka tkb tkk tkm tko tks tkt tma tmb tmk tmm tmo tms tmt to- toa tob tok tom too tos tot tsa tsb tsk tsm tso tss tst tta ttb ttk ttm tto tts ttt