-al -ol a-a a-b a-t aaa aab aal aao aap aar aat ab- aba abb abl abo abp abr abt al- ala alb all alo alp alr alt aoa aob aol aoo aop aor aot ap- apa apb apl apo app apr apt ar- ara arb arl aro arp arr art at- ata atb atl ato atp atr att b-p baa bab bal bao bap bar bat bba bbb bbl bbo bbp bbr bbt bla blb bll blo blp blr blt boa bob bol boo bop bor bot bpa bpb bpl bpo bpp bpr bpt bra brb brl bro brp brr brt bta btb btl bto btp btr btt l-p la- laa lab lal lao lap lar lat lba lbb lbl lbo lbp lbr lbt lla llb lll llo llp llr llt loa lob lol loo lop lor lot lpa lpb lpl lpo lpp lpr lpt lra lrb lro lrp lrr lrt lta ltb ltl lto ltp ltr ltt oaa oab oal oao oap oar oat ob- oba obb obl obo obp obr obt ola olb oll olo olp olt oo- ooa oob ool ooo oop oor oot op- opa opb opl opo opp opr opt or- ora orb orl oro orp orr ort ot- ota otb otl oto otp otr ott p-p paa pab pal pao pap par pat pba pbb pbl pbo pbp pbr pbt pla plb pll plo plp plr plt poa pob pol poo pop por pot ppa ppb ppl ppo ppp ppr ppt pra prb prl pro prp prr prt pt- pta ptb ptl pto ptp ptr ptt ra- raa rab ral rao rap rar rat rba rbb rbl rbo rbp rbr rbt rla rll rlo rlp rlr rlt roa rob rol roo rop ror rot rpa rpb rpl rpo rpp rpr rpt rra rrb rrl rrp rrr rrt rta rtb rtl rto rtp rtr rtt taa tab tal tao tap tar tat tba tbb tbl tbo tbp tbr tbt tla tll tlo tlp tlr tlt to- toa tob tol too top tor tot tpa tpb tpl tpo tpp tpr tpt tra trb trl tro trp trr trt tta ttb ttl tto ttp ttr ttt