-al -ol a-a a-b a-c aaa aab aac aad aal aao aap aar aas ab- aba abb abc abd abl abo abp abr abs ac- aca acb acc acd acl aco acp acr acs ad- ada adb adc add adl ado adp adr ads al- ala alb alc ald all alo alp alr als aoa aob aoc aod aol aoo aop aor aos ap- apa apb apc apd apl apo app apr aps ar- ara arb arc ard arl aro arp arr ars as- asa asb asc asd asl aso asp asr ass b-p baa bab bac bad bal bao bap bar bas bba bbb bbc bbd bbl bbo bbp bbr bbs bca bcb bcc bcd bcl bco bcp bcr bcs bda bdb bdc bdd bdl bdo bdp bdr bds bla blb blc bld bll blo blp blr bls boa bob boc bod bol boo bop bor bos bpa bpb bpc bpd bpl bpo bpp bpr bps bra brb brd brl bro brp brr brs bsa bsb bsc bsd bsl bso bsp bsr bss c-- caa cab cac cad cal cao cap car cas cba cbb cbc cbd cbl cbo cbp cbr cbs cca ccb ccc ccd ccl cco ccp ccr ccs cda cdb cdc cdd cdl cdo cdp cdr cds cl- cla clb clc cld cll clo clp clr cls co- coa cob coc cod col coo cop cor cos cpa cpb cpc cpd cpl cpo cpp cpr cps cra crb crc crd crl cro crp crr crs csa csb csc csd csl cso csp csr css daa dab dac dad dal dao dap dar das dba dbb dbc dbd dbl dbo dbp dbr dbs dca dcb dcc dcd dcl dco dcp dcr dcs dda ddb ddc ddd ddl ddo ddp ddr dds dl- dla dlb dlc dld dll dlo dlp dlr dls doa dob doc dod dol doo dop dor dos dpa dpb dpc dpd dpl dpo dpp dpr dps dra drb drc drd drl dro drp drr drs dsa dsb dsc dsd dsl dso dsp dsr dss l-p la- laa lab lac lad lal lao lap lar las lba lbb lbc lbd lbl lbo lbp lbr lbs lca lcb lcc lcd lcl lco lcp lcr lcs lda ldb ldc ldd ldl ldo ldp ldr lds lla llb llc lld lll llo llp llr lls loa lob loc lod lol loo lop lor los lpa lpb lpc lpd lpl lpo lpp lpr lps lra lrb lrc lrd lro lrp lrr lrs lsa lsb lsc lsd lsl lso lsp lsr lss oaa oab oac oad oal oao oap oar oas ob- oba obb obc obd obl obo obp obr obs oc- oca ocb occ ocd ocl oco ocp ocr ocs oda odb odc odd odl odo odp odr ods ola olb olc old oll olo olp ols oo- ooa oob ooc ood ool ooo oop oor oos op- opa opb opc opd opl opo opp opr ops or- ora orb orc ord orl oro orp orr ors os- osa osb osc osd osl oso osp osr oss p-p paa pab pac pad pal pao pap par pas pba pbb pbc pbd pbl pbo pbp pbr pbs pca pcb pcc pcd pcl pco pcp pcr pcs pda pdb pdc pdd pdl pdo pdp pdr pds pla plb plc pld pll plo plp plr pls poa pob poc pod pol poo pop por pos ppa ppb ppc ppd ppl ppo ppp ppr pps pra prb prc prd prl pro prp prr prs ps- psa psb psc psd psl pso psp psr pss ra- raa rab rac rad ral rao rap rar ras rba rbb rbc rbd rbl rbo rbp rbr rbs rca rcb rcc rcd rcl rco rcp rcr rcs rda rdb rdc rdd rdl rdo rdp rdr rds rla rlc rld rll rlo rlp rlr rls roa rob roc rod rol roo rop ror ros rpa rpb rpc rpd rpl rpo rpp rpr rps rra rrb rrc rrd rrl rrp rrr rrs rsa rsb rsc rsd rsl rso rsp rsr rss saa sab sac sad sal sao sap sar sas sba sbb sbc sbd sbl sbo sbp sbr sbs sca scb scc scd scl sco scp scr scs sda sdb sdc sdd sdl sdo sdp sdr sds sla slb slc sld sll slo slp slr sls soa sob soc sod sol soo sop sor sos spa spb spc spd spl spo spp spr sps sr- sra srb src srd srl sro srp srr srs ss- ssa ssb ssc ssd ssl sso ssp ssr sss