-al -ol a-a a-b aaa aab aaf aal aao aap aar ab- aba abb abf abl abo abp abr af- afa afb aff afl afo afp afr al- ala alb alf all alo alp alr aoa aob aof aol aoo aop aor ap- apa apb apf apl apo app apr ar- ara arb arf arl aro arp arr b-p baa bab baf bal bao bap bar bba bbb bbf bbl bbo bbp bbr bfa bfb bff bfl bfo bfp bfr bla blb blf bll blo blp blr boa bob bof bol boo bop bor bpa bpb bpf bpl bpo bpp bpr bra brb brf brl bro brp brr faa fab faf fal fao fap far fba fbb fbf fbl fbo fbp fbr ffa fff ffl ffo ffp ffr fla flb flf fll flo flp flr foa fob fof fol foo fop for fpa fpb fpl fpo fpp fpr fra frb frf frl fro frp frr l-p la- laa lab laf lal lao lap lar lba lbb lbf lbl lbo lbp lbr lfa lfb lff lfl lfo lfp lfr lla llb llf lll llo llp llr loa lob lof lol loo lop lor lpa lpb lpf lpl lpo lpp lpr lra lrb lrf lro lrp lrr oaa oab oaf oal oao oap oar ob- oba obb obf obl obo obp obr of- ofa ofb off ofl ofo ofp ofr ola olb olf oll olo olp oo- ooa oob oof ool ooo oop oor op- opa opb opf opl opo opp opr or- ora orb orf orl oro orp orr p-p paa pab paf pal pao pap par pba pbb pbf pbl pbo pbp pbr pfa pfb pff pfl pfo pfp pfr pla plb plf pll plo plp plr poa pob pof pol poo pop por ppa ppb ppf ppl ppo ppp ppr pra prb prf prl pro prp prr ra- raa rab raf ral rao rap rar rba rbb rbf rbl rbo rbp rbr rfa rfb rff rfl rfo rfp rfr rla rlf rll rlo rlp rlr roa rob rof rol roo rop ror rpa rpb rpf rpl rpo rpp rpr rra rrb rrf rrl rrp rrr