-al -ol a-a a-b a-t aaa aab aad aal aao aar aas aat ab- aba abb abd abl abo abr abs abt ad- ada adb add adl ado adr ads adt al- ala alb ald all alo alr als alt aoa aob aod aol aoo aor aos aot ar- ara arb ard arl aro arr ars art as- asa asb asd asl aso asr ass ast at- ata atb atd atl ato atr ats att baa bab bad bal bao bar bas bat bba bbb bbd bbl bbo bbr bbs bbt bda bdb bdd bdl bdo bdr bds bdt bla blb bld bll blo blr bls blt boa bob bod bol boo bor bos bot bra brb brd brl bro brr brs brt bsa bsb bsd bsl bso bsr bss bst bta btb btd btl bto btr bts btt daa dab dad dal dao dar das dat dba dbb dbd dbl dbo dbr dbs dbt dda ddb ddd ddl ddo ddr dds ddt dl- dla dlb dld dll dlo dlr dls dlt doa dob dod dol doo dor dos dot dra drb drd drl dro drr drs drt dsa dsb dsd dsl dso dsr dss dst dta dtb dtd dtl dto dtr dts dtt la- laa lab lad lal lao lar las lat lba lbb lbd lbl lbo lbr lbs lbt lda ldb ldd ldl ldo ldr lds ldt lla llb lld lll llo llr lls llt loa lob lod lol loo lor los lot lra lrb lrd lro lrr lrs lrt lsa lsb lsd lsl lso lsr lss lst lta ltb ltd ltl lto ltr lts ltt oaa oab oad oal oao oar oas oat ob- oba obb obd obl obo obr obs obt oda odb odd odl odo odr ods odt ola olb old oll olo ols olt oo- ooa oob ood ool ooo oor oos oot or- ora orb ord orl oro orr ors ort os- osa osb osd osl oso osr oss ost ot- ota otb otd otl oto otr ots ott ra- raa rab rad ral rao rar ras rat rba rbb rbd rbl rbo rbr rbs rbt rda rdb rdd rdl rdo rdr rds rdt rla rld rll rlo rlr rls rlt roa rob rod rol roo ror ros rot rra rrb rrd rrl rrr rrs rrt rsa rsb rsd rsl rso rsr rss rst rta rtb rtd rtl rto rtr rts rtt saa sab sad sal sao sar sas sat sba sbb sbd sbl sbo sbr sbs sbt sda sdb sdd sdl sdo sdr sds sdt sla slb sld sll slo slr sls slt soa sob sod sol soo sor sos sot sr- sra srb srd srl sro srr srs srt ss- ssa ssb ssd ssl sso ssr sss sst sta stb std stl sto str sts stt taa tab tad tal tao tar tas tat tba tbb tbd tbl tbo tbr tbs tbt tda tdb tdd tdl tdo tdr tds tdt tla tld tll tlo tlr tls tlt to- toa tob tod tol too tor tos tot tra trb trd trl tro trr trs trt tsa tsb tsd tsl tso tsr tss tst tta ttb ttd ttl tto ttr tts ttt