-al -ol a-a a-b a-c a-t aaa aab aac aal aao aap aar aat ab- aba abb abc abl abo abp abr abt ac- aca acb acc acl aco acp acr act al- ala alb alc all alo alp alr alt aoa aob aoc aol aoo aop aor aot ap- apa apb apc apl apo app apr apt ar- ara arb arc arl aro arp arr art at- ata atb atc atl ato atp atr att b-p baa bab bac bal bao bap bar bat bba bbb bbc bbl bbo bbp bbr bbt bca bcb bcc bcl bco bcp bcr bct bla blb blc bll blo blp blr blt boa bob boc bol boo bop bor bot bpa bpb bpc bpl bpo bpp bpr bpt bra brb brl bro brp brr brt bta btb btc btl bto btp btr btt c-- caa cab cac cal cao cap car cat cba cbb cbc cbl cbo cbp cbr cbt cca ccb ccc ccl cco ccp ccr cct cl- cla clb clc cll clo clp clr clt co- coa cob coc col coo cop cor cot cpa cpb cpc cpl cpo cpp cpr cpt cra crb crc crl cro crp crr crt cta ctb ctc ctl cto ctp ctr ctt l-p la- laa lab lac lal lao lap lar lat lba lbb lbc lbl lbo lbp lbr lbt lca lcb lcc lcl lco lcp lcr lct lla llb llc lll llo llp llr llt loa lob loc lol loo lop lor lot lpa lpb lpc lpl lpo lpp lpr lpt lra lrb lrc lro lrp lrr lrt lta ltb ltc ltl lto ltp ltr ltt oaa oab oac oal oao oap oar oat ob- oba obb obc obl obo obp obr obt oc- oca ocb occ ocl oco ocp ocr oct ola olb olc oll olo olp olt oo- ooa oob ooc ool ooo oop oor oot op- opa opb opc opl opo opp opr opt or- ora orb orc orl oro orp orr ort ot- ota otb otc otl oto otp otr ott p-p paa pab pac pal pao pap par pat pba pbb pbc pbl pbo pbp pbr pbt pca pcb pcc pcl pco pcp pcr pct pla plb plc pll plo plp plr plt poa pob poc pol poo pop por pot ppa ppb ppc ppl ppo ppp ppr ppt pra prb prc prl pro prp prr prt pt- pta ptb ptc ptl pto ptp ptr ptt ra- raa rab rac ral rao rap rar rat rba rbb rbc rbl rbo rbp rbr rbt rca rcb rcc rcl rco rcp rcr rct rla rlc rll rlo rlp rlr rlt roa rob roc rol roo rop ror rot rpa rpb rpc rpl rpo rpp rpr rpt rra rrb rrc rrl rrp rrr rrt rta rtb rtc rtl rto rtp rtr rtt taa tab tac tal tao tap tar tat tba tbb tbc tbl tbo tbp tbr tbt tca tcb tcc tcl tco tcp tcr tct tla tlc tll tlo tlp tlr tlt to- toa tob toc tol too top tor tot tpa tpb tpc tpl tpo tpp tpr tpt tra trb trc trl tro trp trr trt tta ttb ttc ttl tto ttp ttr ttt