-al -ol a-a a-b a-c a-t aaa aab aac aal aam aao aat ab- aba abb abc abl abm abo abt ac- aca acb acc acl acm aco act al- ala alb alc all alm alo alt ama amb amc aml amm amo amt aoa aob aoc aol aom aoo aot at- ata atb atc atl atm ato att baa bab bac bal bam bao bat bba bbb bbc bbl bbm bbo bbt bca bcb bcc bcl bcm bco bct bla blb blc bll blm blo blt bma bmb bmc bml bmm bmo bmt boa bob boc bol bom boo bot bta btb btc btl btm bto btt c-- caa cab cac cal cam cao cat cba cbb cbc cbl cbm cbo cbt cca ccb ccc ccl ccm cco cct cl- cla clb clc cll clm clo clt cma cmb cmc cml cmm cmo cmt co- coa cob coc col com coo cot cta ctb ctc ctl ctm cto ctt la- laa lab lac lal lam lao lat lba lbb lbc lbl lbm lbo lbt lca lcb lcc lcl lcm lco lct lla llb llc lll llm llo llt lma lmb lmc lml lmm lmo lmt loa lob loc lol lom loo lot lta ltb ltc ltl ltm lto ltt m-o maa mab mac mal mam mao mat mba mbb mbc mbl mbm mbo mbt mc- mca mcb mcc mcl mcm mco mct mla mlb mlc mll mlm mlo mlt mma mmb mmc mml mmm mmo mmt moa mob moc mol mom moo mot mta mtb mtc mtl mtm mto mtt oaa oab oac oal oam oao oat ob- oba obb obc obl obm obo obt oc- oca ocb occ ocl ocm oco oct ola olb olc oll olm olo olt om- oma omb omc oml omm omo omt oo- ooa oob ooc ool oom ooo oot ot- ota otb otc otl otm oto ott taa tab tac tal tam tao tat tba tbb tbc tbl tbm tbo tbt tca tcb tcc tcl tcm tco tct tla tlc tll tlm tlo tlt tma tmb tmc tml tmm tmo tmt to- toa tob toc tol tom too tot tta ttb ttc ttl ttm tto ttt