-al -ol a-a a-b a-c aaa aab aac aal aao aap aar ab- aba abb abc abl abo abp abr ac- aca acb acc acl aco acp acr al- ala alb alc all alo alp alr aoa aob aoc aol aoo aop aor ap- apa apb apc apl apo app apr ar- ara arb arc arl aro arp arr b-p baa bab bac bal bao bap bar bba bbb bbc bbl bbo bbp bbr bca bcb bcc bcl bco bcp bcr bla blb blc bll blo blp blr boa bob boc bol boo bop bor bpa bpb bpc bpl bpo bpp bpr bra brb brl bro brp brr c-- caa cab cac cal cao cap car cba cbb cbc cbl cbo cbp cbr cca ccb ccc ccl cco ccp ccr cl- cla clb clc cll clo clp clr co- coa cob coc col coo cop cor cpa cpb cpc cpl cpo cpp cpr cra crb crc crl cro crp crr l-p la- laa lab lac lal lao lap lar lba lbb lbc lbl lbo lbp lbr lca lcb lcc lcl lco lcp lcr lla llb llc lll llo llp llr loa lob loc lol loo lop lor lpa lpb lpc lpl lpo lpp lpr lra lrb lrc lro lrp lrr oaa oab oac oal oao oap oar ob- oba obb obc obl obo obp obr oc- oca ocb occ ocl oco ocp ocr ola olb olc oll olo olp oo- ooa oob ooc ool ooo oop oor op- opa opb opc opl opo opp opr or- ora orb orc orl oro orp orr p-p paa pab pac pal pao pap par pba pbb pbc pbl pbo pbp pbr pca pcb pcc pcl pco pcp pcr pla plb plc pll plo plp plr poa pob poc pol poo pop por ppa ppb ppc ppl ppo ppp ppr pra prb prc prl pro prp prr ra- raa rab rac ral rao rap rar rba rbb rbc rbl rbo rbp rbr rca rcb rcc rcl rco rcp rcr rla rlc rll rlo rlp rlr roa rob roc rol roo rop ror rpa rpb rpc rpl rpo rpp rpr rra rrb rrc rrl rrp rrr