-al -ol a-a a-b a-c aaa aab aac aad aah aak aal aao ab- aba abb abc abd abh abk abl abo ac- aca acb acc acd ach ack acl aco ad- ada adb adc add adh adk adl ado aha ahb ahc ahd ahh ahk ahl aho aka akb akc akd akh akk akl ako al- ala alb alc ald alh alk all alo aoa aob aoc aod aoh aok aol aoo baa bab bac bad bah bak bal bao bba bbb bbc bbd bbh bbk bbl bbo bca bcb bcc bcd bch bck bcl bco bda bdb bdc bdd bdh bdk bdl bdo bha bhb bhc bhd bhh bhk bhl bho bka bkb bkc bkk bkl bko bla blb blc bld blh blk bll blo boa bob boc bod boh bok bol boo c-- caa cab cac cad cah cak cal cao cba cbb cbc cbd cbh cbk cbl cbo cca ccb ccc ccd cch cck ccl cco cda cdb cdc cdd cdh cdk cdl cdo ch- cha chb chc chd chh chk chl cho cka ckb ckc ckd ckh cko cl- cla clb clc cld clh clk cll clo co- coa cob coc cod coh cok col coo daa dab dac dad dah dak dal dao dba dbb dbc dbd dbh dbk dbl dbo dca dcb dcc dcd dck dcl dco dda ddb ddc ddd ddh ddk ddl ddo dh- dha dhb dhc dhd dhh dhk dhl dho dka dkb dkc dkk dkl dko dl- dla dlb dlc dld dlh dlk dll dlo doa dob doc dod doh dok dol doo haa hab hac had hah hak hal hao hba hbb hbc hbd hbh hbk hbl hbo hca hcb hcc hcd hch hck hcl hco hda hdb hdc hdd hdh hdk hdl hdo hha hhb hhc hhd hhh hhk hhl hho hka hkb hkd hkh hkk hkl hko hla hlb hlc hld hlh hll hlo hoa hob hoc hod hoh hok hol hoo ka- kaa kab kac kad kah kak kal kao kba kbb kbc kbd kbh kbk kbl kbo kca kcb kcc kcd kch kck kcl kda kdb kdc kdh kdk kdl kdo kha khh khk kho kkb kkc kkh kkk kkl kl- kla klb klc kld klh klo koa kob koc kod koh kok kol koo la- laa lab lac lad lah lak lal lao lba lbb lbc lbd lbh lbk lbl lbo lca lcb lcc lcd lch lck lcl lco lda ldb ldc ldd ldh ldk ldl ldo lha lhb lhc lhd lhh lhk lho lka lkb lkh lkl lla llb llc lld llk lll llo loa lob loc lod loh lok lol loo oaa oab oac oad oah oak oal oao ob- oba obb obc obd obh obk obl obo oc- oca ocb occ ocd och ock ocl oco oda odb odc odd odh odl odo oha ohc ohd ohh ohl oho oka okb okc okd okk okl oko ola olb olc old olk oll olo oo- ooa oob ooc ood ooh ook ool ooo