-al -ol a-a a-b a-c aaa aab aac aah aak aal aao ab- aba abb abc abh abk abl abo ac- aca acb acc ach ack acl aco aha ahb ahc ahh ahk ahl aho aka akb akc akh akk akl ako al- ala alb alc alh alk all alo aoa aob aoc aoh aok aol aoo baa bab bac bah bak bal bao bba bbb bbc bbh bbk bbl bbo bca bcb bcc bch bck bcl bco bha bhb bhc bhh bhk bhl bho bka bkb bkc bkk bkl bko bla blb blc blh blk bll blo boa bob boc boh bok bol boo c-- caa cab cac cah cak cal cao cba cbb cbc cbh cbk cbl cbo cca ccb ccc cch cck ccl cco ch- cha chb chc chh chk chl cho cka ckb ckc ckh cko cl- cla clb clc clh clk cll clo co- coa cob coc coh cok col coo haa hab hac hah hak hal hao hba hbb hbc hbh hbk hbl hbo hca hcb hcc hch hck hcl hco hha hhb hhc hhh hhk hhl hho hka hkb hkh hkk hkl hko hla hlb hlc hlh hll hlo hoa hob hoc hoh hok hol hoo ka- kaa kab kac kah kak kal kao kba kbb kbc kbh kbk kbl kbo kca kcb kcc kch kck kcl kha khh khk kho kkb kkc kkh kkk kkl kl- kla klb klc klh klo koa kob koc koh kok kol koo la- laa lab lac lah lak lal lao lba lbb lbc lbh lbk lbl lbo lca lcb lcc lch lck lcl lco lha lhb lhc lhh lhk lho lka lkb lkh lkl lla llb llc llk lll llo loa lob loc loh lok lol loo oaa oab oac oah oak oal oao ob- oba obb obc obh obk obl obo oc- oca ocb occ och ock ocl oco oha ohc ohh ohl oho oka okb okc okk okl oko ola olb olc olk oll olo oo- ooa oob ooc ooh ook ool ooo