-al -ol a-a a-b a-c aaa aab aac aad aah aal aao aar aas ab- aba abb abc abd abh abl abo abr abs ac- aca acb acc acd ach acl aco acr acs ad- ada adb adc add adh adl ado adr ads aha ahb ahc ahd ahh ahl aho ahr ahs al- ala alb alc ald alh all alo alr als aoa aob aoc aod aoh aol aoo aor aos ar- ara arb arc ard arh arl aro arr ars as- asa asb asc asd ash asl aso asr ass baa bab bac bad bah bal bao bar bas bba bbb bbc bbd bbh bbl bbo bbr bbs bca bcb bcc bcd bch bcl bco bcr bcs bda bdb bdc bdd bdh bdl bdo bdr bds bha bhb bhc bhd bhh bhl bho bhr bhs bla blb blc bld blh bll blo blr bls boa bob boc bod boh bol boo bor bos bra brb brd brh brl bro brr brs bsa bsb bsc bsd bsh bsl bso bsr bss c-- caa cab cac cad cah cal cao car cas cba cbb cbc cbd cbh cbl cbo cbr cbs cca ccb ccc ccd cch ccl cco ccr ccs cda cdb cdc cdd cdh cdl cdo cdr cds ch- cha chb chc chd chh chl cho chr chs cl- cla clb clc cld clh cll clo clr cls co- coa cob coc cod coh col coo cor cos cra crb crc crd crh crl cro crr crs csa csb csc csd csh csl cso csr css daa dab dac dad dah dal dao dar das dba dbb dbc dbd dbh dbl dbo dbr dbs dca dcb dcc dcd dcl dco dcr dcs dda ddb ddc ddd ddh ddl ddo ddr dds dh- dha dhb dhc dhd dhh dhl dho dhr dhs dl- dla dlb dlc dld dlh dll dlo dlr dls doa dob doc dod doh dol doo dor dos dra drb drc drd drl dro drr drs dsa dsb dsc dsd dsh dsl dso dsr dss haa hab hac had hah hal hao har has hba hbb hbc hbd hbh hbl hbo hbr hbs hca hcb hcc hcd hch hcl hco hcr hcs hda hdb hdc hdd hdh hdl hdo hdr hds hha hhb hhc hhd hhh hhl hho hhr hhs hla hlb hlc hld hlh hll hlo hlr hls hoa hob hoc hod hoh hol hoo hor hos hr- hra hrb hrc hrd hrh hrl hro hrr hrs hsa hsb hsc hsd hsh hsl hsr hss la- laa lab lac lad lah lal lao lar las lba lbb lbc lbd lbh lbl lbo lbr lbs lca lcb lcc lcd lch lcl lco lcr lcs lda ldb ldc ldd ldh ldl ldo ldr lds lha lhb lhc lhd lhh lho lhr lhs lla llb llc lld lll llo llr lls loa lob loc lod loh lol loo lor los lra lrb lrc lrd lrh lro lrr lrs lsa lsb lsc lsd lsh lsl lso lsr lss oaa oab oac oad oah oal oao oar oas ob- oba obb obc obd obh obl obo obr obs oc- oca ocb occ ocd och ocl oco ocr ocs oda odb odc odd odh odl odo odr ods oha ohc ohd ohh ohl oho ohr ohs ola olb olc old oll olo ols oo- ooa oob ooc ood ooh ool ooo oor oos or- ora orb orc ord orh orl oro orr ors os- osa osb osc osd osh osl oso osr oss ra- raa rab rac rad rah ral rao rar ras rba rbb rbc rbd rbh rbl rbo rbr rbs rca rcb rcc rcd rch rcl rco rcr rcs rda rdb rdc rdd rdh rdl rdo rdr rds rh- rha rhb rhc rhd rhh rhl rho rhr rhs rla rlc rld rlh rll rlo rlr rls roa rob roc rod roh rol roo ror ros rra rrb rrc rrd rrh rrl rrr rrs rsa rsb rsc rsd rsh rsl rso rsr rss saa sab sac sad sah sal sao sar sas sba sbb sbc sbd sbh sbl sbo sbr sbs sca scb scc scd sch scl sco scr scs sda sdb sdc sdd sdh sdl sdo sdr sds sh- sha shb shc shd shh shl sho shr shs sla slb slc sld slh sll slo slr sls soa sob soc sod soh sol soo sor sos sr- sra srb src srd srh srl sro srr srs ss- ssa ssb ssc ssd ssh ssl sso ssr sss