-al -ol a-a a-b a-c aaa aab aac aal aam aao aar aas ab- aba abb abc abl abm abo abr abs ac- aca acb acc acl acm aco acr acs al- ala alb alc all alm alo alr als ama amb amc aml amm amo amr ams aoa aob aoc aol aom aoo aor aos ar- ara arb arc arl arm aro arr ars as- asa asb asc asl asm aso asr ass baa bab bac bal bam bao bar bas bba bbb bbc bbl bbm bbo bbr bbs bca bcb bcc bcl bcm bco bcr bcs bla blb blc bll blm blo blr bls bma bmb bmc bml bmm bmo bmr bms boa bob boc bol bom boo bor bos bra brb brl brm bro brr brs bsa bsb bsc bsl bsm bso bsr bss c-- caa cab cac cal cam cao car cas cba cbb cbc cbl cbm cbo cbr cbs cca ccb ccc ccl ccm cco ccr ccs cl- cla clb clc cll clm clo clr cls cma cmb cmc cml cmm cmo cmr cms co- coa cob coc col com coo cor cos cra crb crc crl crm cro crr crs csa csb csc csl csm cso csr css la- laa lab lac lal lam lao lar las lba lbb lbc lbl lbm lbo lbr lbs lca lcb lcc lcl lcm lco lcr lcs lla llb llc lll llm llo llr lls lma lmb lmc lml lmm lmo lmr lms loa lob loc lol lom loo lor los lra lrb lrc lrm lro lrr lrs lsa lsb lsc lsl lsm lso lsr lss m-o m-r maa mab mac mal mam mao mar mas mba mbb mbc mbl mbm mbo mbr mbs mc- mca mcb mcc mcl mcm mco mcr mcs mla mlb mlc mll mlm mlo mlr mls mma mmb mmc mml mmm mmo mmr mms moa mob moc mol mom moo mor mos mra mrb mrc mrl mrm mro mrr mrs msa msb msc msl msm mso msr mss oaa oab oac oal oam oao oar oas ob- oba obb obc obl obm obo obr obs oc- oca ocb occ ocl ocm oco ocr ocs ola olb olc oll olm olo ols om- oma omb omc oml omm omo omr oms oo- ooa oob ooc ool oom ooo oor oos or- ora orb orc orl orm oro orr ors os- osa osb osc osl osm oso osr oss ra- raa rab rac ral ram rao rar ras rba rbb rbc rbl rbm rbo rbr rbs rca rcb rcc rcl rcm rco rcr rcs rla rlc rll rlm rlo rlr rls rma rmb rmc rml rmm rmo rmr rms roa rob roc rol rom roo ror ros rra rrb rrc rrl rrm rrr rrs rsa rsb rsc rsl rsm rso rsr rss saa sab sac sal sam sao sar sas sba sbb sbc sbl sbm sbo sbr sbs sca scb scc scl scm sco scr scs sla slb slc sll slm slo slr sls sma smb smc sml smm smo smr sms soa sob soc sol som soo sor sos sr- sra srb src srl srm sro srr srs ss- ssa ssb ssc ssl ssm sso ssr sss