-al -ol a-a a-b aaa aab aal aao aap aar aas ab- aba abb abl abo abp abr abs al- ala alb all alo alp alr als aoa aob aol aoo aop aor aos ap- apa apb apl apo app apr aps ar- ara arb arl aro arp arr ars as- asa asb asl aso asp asr ass b-p baa bab bal bao bap bar bas bba bbb bbl bbo bbp bbr bbs bla blb bll blo blp blr bls boa bob bol boo bop bor bos bpa bpb bpl bpo bpp bpr bps bra brb brl bro brp brr brs bsa bsb bsl bso bsp bsr bss l-p la- laa lab lal lao lap lar las lba lbb lbl lbo lbp lbr lbs lla llb lll llo llp llr lls loa lob lol loo lop lor los lpa lpb lpl lpo lpp lpr lps lra lrb lro lrp lrr lrs lsa lsb lsl lso lsp lsr lss oaa oab oal oao oap oar oas ob- oba obb obl obo obp obr obs ola olb oll olo olp ols oo- ooa oob ool ooo oop oor oos op- opa opb opl opo opp opr ops or- ora orb orl oro orp orr ors os- osa osb osl oso osp osr oss p-p paa pab pal pao pap par pas pba pbb pbl pbo pbp pbr pbs pla plb pll plo plp plr pls poa pob pol poo pop por pos ppa ppb ppl ppo ppp ppr pps pra prb prl pro prp prr prs ps- psa psb psl pso psp psr pss ra- raa rab ral rao rap rar ras rba rbb rbl rbo rbp rbr rbs rla rll rlo rlp rlr rls roa rob rol roo rop ror ros rpa rpb rpl rpo rpp rpr rps rra rrb rrl rrp rrr rrs rsa rsb rsl rso rsp rsr rss saa sab sal sao sap sar sas sba sbb sbl sbo sbp sbr sbs sla slb sll slo slp slr sls soa sob sol soo sop sor sos spa spb spl spo spp spr sps sr- sra srb srl sro srp srr srs ss- ssa ssb ssl sso ssp ssr sss