-al -ol a-a a-b a-c aaa aab aac aah aal aao aap ab- aba abb abc abh abl abo abp ac- aca acb acc ach acl aco acp aha ahb ahc ahh ahl aho ahp al- ala alb alc alh all alo alp aoa aob aoc aoh aol aoo aop ap- apa apb apc aph apl apo app b-p baa bab bac bah bal bao bap bba bbb bbc bbh bbl bbo bbp bca bcb bcc bch bcl bco bcp bha bhb bhc bhh bhl bho bhp bla blb blc blh bll blo blp boa bob boc boh bol boo bop bpa bpb bpc bph bpl bpo bpp c-- caa cab cac cah cal cao cap cba cbb cbc cbh cbl cbo cbp cca ccb ccc cch ccl cco ccp ch- cha chb chc chh chl cho chp cl- cla clb clc clh cll clo clp co- coa cob coc coh col coo cop cpa cpb cpc cph cpl cpo cpp haa hab hac hah hal hao hap hba hbb hbc hbh hbl hbo hbp hca hcb hcc hch hcl hco hcp hha hhb hhc hhh hhl hho hhp hla hlb hlc hlh hll hlo hlp hoa hob hoc hoh hol hoo hop hpa hpb hpc hph hpl hpo hpp l-p la- laa lab lac lah lal lao lap lba lbb lbc lbh lbl lbo lbp lca lcb lcc lch lcl lco lcp lha lhb lhc lhh lho lhp lla llb llc lll llo llp loa lob loc loh lol loo lop lpa lpb lpc lph lpl lpo lpp oaa oab oac oah oal oao oap ob- oba obb obc obh obl obo obp oc- oca ocb occ och ocl oco ocp oha ohc ohh ohl oho ohp ola olb olc oll olo olp oo- ooa oob ooc ooh ool ooo oop op- opa opb opc oph opl opo opp p-p paa pab pac pah pal pao pap pba pbb pbc pbl pbo pbp pca pcb pcc pch pcl pco pcp pha phb phc phl pho php pla plb plc plh pll plo plp poa pob poc poh pol poo pop ppa ppb ppc pph ppl ppo ppp