-al -ol a-a a-b a-c aaa aab aac aae aah aal aao aap ab- aba abb abc abe abh abl abo abp ac- aca acb acc ace ach acl aco acp aea aeb aec aee aeh ael aeo aep aha ahb ahc ahe ahh ahl aho ahp al- ala alb alc ale alh all alo alp aoa aob aoc aoe aoh aol aoo aop ap- apa apb apc ape aph apl apo app b-p baa bab bac bae bah bal bao bap bba bbb bbc bbe bbh bbl bbo bbp bca bcb bcc bce bch bcl bco bcp be- bea beb bec bee beh bel beo bep bha bhb bhc bhe bhh bhl bho bhp bla blb blc ble blh bll blo blp boa bob boc boe boh bol boo bop bpa bpb bpc bpe bph bpl bpo bpp c-- caa cab cac cae cah cal cao cap cba cbb cbc cbe cbh cbl cbo cbp cca ccb ccc cce cch ccl cco ccp ce- cea ceb cec cee ceh cel ceo cep ch- cha chb chc che chh chl cho chp cl- cla clb clc cle clh cll clo clp co- coa cob coc coe coh col coo cop cpa cpb cpc cpe cph cpl cpo cpp eaa eab eac eae eah eal eao eap eba ebb ebc ebe ebh ebl ebo ebp ec- eca ecb ecc ece ech ecl eco eea eeb eec eee eel eeo eep eha ehb ehc ehe ehh ehl eho ehp ela elb elc ele elh ell elo elp eo- eoa eob eoc eoe eoh eol eoo eop ep- epa epb epc epe eph epl epo epp haa hab hac hae hah hal hao hap hba hbb hbc hbe hbh hbl hbo hbp hca hcb hcc hce hch hcl hco hcp he- hea heb hec hee heh hel heo hep hha hhb hhc hhe hhh hhl hho hhp hla hlb hlc hle hlh hll hlo hlp hoa hob hoc hoe hoh hol hoo hop hpa hpb hpc hpe hph hpl hpo hpp l-p la- laa lab lac lae lah lal lao lap lba lbb lbc lbe lbh lbl lbo lbp lca lcb lcc lce lch lcl lco lcp lea leb lec lee leh lel leo lep lha lhb lhc lhh lho lhp lla llb llc lle lll llo llp loa lob loc loe loh lol loo lop lpa lpb lpc lpe lph lpl lpo lpp oaa oab oac oae oah oal oao oap ob- oba obb obc obe obh obl obo obp oc- oca ocb occ och ocl oco ocp oea oeb oec oee oeh oel oeo oep oha ohc ohe ohh ohl oho ohp ola olb olc ole oll olo olp oo- ooa oob ooc ooh ool ooo oop op- opa opb opc ope oph opl opo opp p-p paa pab pac pae pah pal pao pap pba pbb pbc pbe pbl pbo pbp pca pcb pcc pce pch pcl pco pcp pea peb pec pee peh pel peo pep pha phb phc phe phl pho php pla plb plc ple plh pll plo plp poa pob poc poe poh pol poo pop ppa ppb ppc ppe pph ppl ppo ppp