-al a-a a-b aaa aab aad aal aar aas ab- aba abb abd abl abr abs ad- ada adb add adl adr ads al- ala alb ald all alr als ar- ara arb ard arl arr ars as- asa asb asd asl asr ass baa bab bad bal bar bas bba bbb bbd bbl bbr bbs bda bdb bdd bdl bdr bds bla blb bld bll blr bls bra brb brd brl brr brs bsa bsb bsd bsl bsr bss daa dab dad dal dar das dba dbb dbd dbl dbr dbs dda ddb ddd ddl ddr dds dl- dla dlb dld dll dlr dls dra drb drd drl drr drs dsa dsb dsd dsl dsr dss la- laa lab lad lal lar las lba lbb lbd lbl lbr lbs lda ldb ldd ldl ldr lds lla llb lld lll llr lls lra lrb lrd lrr lrs lsa lsb lsd lsl lsr lss ra- raa rab rad ral rar ras rba rbb rbd rbl rbr rbs rda rdb rdd rdl rdr rds rla rld rll rlr rls rra rrb rrd rrl rrr rrs rsa rsb rsd rsl rsr rss saa sab sad sal sar sas sba sbb sbd sbl sbr sbs sda sdb sdd sdl sdr sds sla slb sld sll slr sls sr- sra srb srd srl srr srs ss- ssa ssb ssd ssl ssr sss