-al a-a a-b a-t aaa aab aal aap aar aas aat ab- aba abb abl abp abr abs abt al- ala alb all alp alr als alt ap- apa apb apl app apr aps apt ar- ara arb arl arp arr ars art as- asa asb asl asp asr ass ast at- ata atb atl atp atr ats att b-p baa bab bal bap bar bas bat bba bbb bbl bbp bbr bbs bbt bla blb bll blp blr bls blt bpa bpb bpl bpp bpr bps bpt bra brb brl brp brr brs brt bsa bsb bsl bsp bsr bss bst bta btb btl btp btr bts btt l-p la- laa lab lal lap lar las lat lba lbb lbl lbp lbr lbs lbt lla llb lll llp llr lls llt lpa lpb lpl lpp lpr lps lpt lra lrb lrp lrr lrs lrt lsa lsb lsl lsp lsr lss lst lta ltb ltl ltp ltr lts ltt p-p paa pab pal pap par pas pat pba pbb pbl pbp pbr pbs pbt pla plb pll plp plr pls plt ppa ppb ppl ppp ppr pps ppt pra prb prl prp prr prs prt ps- psa psb psl psp psr pss pst pt- pta ptb ptl ptp ptr pts ptt ra- raa rab ral rap rar ras rat rba rbb rbl rbp rbr rbs rbt rla rll rlp rlr rls rlt rpa rpb rpl rpp rpr rps rpt rra rrb rrl rrp rrr rrs rrt rsa rsb rsl rsp rsr rss rst rta rtb rtl rtp rtr rts rtt saa sab sal sap sar sas sat sba sbb sbl sbp sbr sbs sbt sla slb sll slp slr sls slt spa spb spl spp spr sps spt sr- sra srb srl srp srr srs srt ss- ssa ssb ssl ssp ssr sss sst sta stb stl stp str sts stt taa tab tal tap tar tas tat tba tbb tbl tbp tbr tbs tbt tla tll tlp tlr tls tlt tpa tpb tpl tpp tpr tps tpt tra trb trl trp trr trs trt tsa tsb tsl tsp tsr tss tst tta ttb ttl ttp ttr tts ttt