a-a a-b a-c a-t aaa aab aac aam aan aao aas aat ab- aba abb abc abm abn abo abs abt ac- aca acb acc acm acn aco acs act ama amb amc amm amn amo ams amt an- ana anb anc anm ann ano ans ant aoa aob aoc aom aon aoo aos aot as- asa asb asc asm asn aso ass ast at- ata atb atc atm atn ato ats att baa bab bac bam ban bao bas bat bba bbb bbc bbm bbn bbo bbs bbt bca bcb bcc bcm bcn bco bcs bct bma bmb bmc bmm bmn bmo bms bmt bna bnb bnc bnn bno bns bnt boa bob boc bom bon boo bos bot bsa bsb bsc bsm bsn bso bss bst bta btb btc btm btn bto bts btt c-- caa cab cac cam can cao cas cat cba cbb cbc cbm cbn cbo cbs cbt cca ccb ccc ccm ccn cco ccs cct cma cmb cmc cmm cmn cmo cms cmt cn- cna cnb cnc cnm cnn cno cns cnt co- coa cob coc com con coo cos cot csa csb csc csm csn cso css cst cta ctb ctc ctm ctn cto cts ctt m-o maa mab mac mam man mao mas mat mba mbb mbc mbm mbo mbs mbt mc- mca mcb mcc mcm mcn mco mcs mct mma mmb mmc mmm mmn mmo mms mmt mna mnb mnc mnm mnn mno mns mnt moa mob moc mom mon moo mos mot msa msb msc msm msn mso mss mst mta mtb mtc mtm mtn mto mts mtt naa nab nac nam nan nao nas nat nba nbb nbc nbm nbn nbo nbs nbt nca ncb ncc ncm ncn nco ncs nct nma nmb nmc nmm nmn nmo nms nmt nna nnb nnc nnm nnn nno nns nnt no- noa nob noc nom non noo nos not nsa nsb nsc nsm nsn nso nss nst nta ntb ntc ntm ntn nto nts ntt oaa oab oac oam oan oao oas oat ob- oba obb obc obm obn obo obs obt oc- oca ocb occ ocm ocn oco ocs oct om- oma omb omc omm omn omo oms omt on- ona onb onc onn ono ons ont oo- ooa oob ooc oom oon ooo oos oot os- osa osb osc osm osn oso oss ost ot- ota otb otc otm otn oto ots ott saa sab sac sam san sao sas sat sba sbb sbc sbm sbn sbo sbs sbt sca scb scc scm scn sco scs sct sma smb smc smm smn smo sms smt sna snb snc snm snn sno sns snt soa sob soc som son soo sos sot ss- ssa ssb ssc ssm ssn sso sss sst sta stb stc stm stn sto sts stt taa tab tac tam tan tao tas tat tba tbb tbc tbm tbn tbo tbs tbt tca tcb tcc tcm tcn tco tcs tct tma tmb tmc tmm tmn tmo tms tmt tna tnb tnc tnm tnn tno tns tnt to- toa tob toc tom ton too tos tot tsa tsb tsc tsm tsn tso tss tst tta ttb ttc ttm ttn tto tts ttt