-al -ol a-a a-b a-i aaa aab aai aal aao aap aar ab- aba abb abi abl abo abp abr ai- aia aib aii ail aio aip air al- ala alb ali all alo alp alr aoa aob aoi aol aoo aop aor ap- apa apb api apl apo app apr ar- ara arb ari arl aro arp arr b-p baa bab bai bal bao bap bar bba bbb bbi bbl bbo bbp bbr bi- bia bib bii bil bio bip bir bla blb bli bll blo blp blr boa bob boi bol boo bop bor bpa bpb bpi bpl bpo bpp bpr bra brb bri brl bro brp brr ia- iaa iab iai ial iao iap iar iba ibb ibi ibl ibo ibp ibr iia iib iii iil iio iip iir il- ila ilb ili ill ilo ilp ilr io- ioa iob ioi iol ioo iop ior ipa ipb ipi ipl ipo ipp ipr ir- ira irb iri irl iro irp irr l-p la- laa lab lai lal lao lap lar lba lbb lbi lbl lbo lbp lbr lia lib lii lil lio lip lir lla llb lli lll llo llp llr loa lob loi lol loo lop lor lpa lpb lpi lpl lpo lpp lpr lra lrb lri lro lrp lrr o-i oaa oab oai oal oao oap oar ob- oba obb obi obl obo obp obr oia oib oii oil oio oip oir ola olb oli oll olo olp oo- ooa oob ooi ool ooo oop oor op- opa opb opi opl opo opp opr or- ora orb ori orl oro orp orr p-p paa pab pai pal pao pap par pba pbb pbi pbl pbo pbp pbr pia pib pii pil pio pip pir pla plb pli pll plo plp plr poa pob poi pol poo pop por ppa ppb ppi ppl ppo ppp ppr pra prb pri prl pro prp prr ra- raa rab rai ral rao rap rar rba rbb rbi rbl rbo rbp rbr ria rib rii ril rio rip rir rla rli rll rlo rlp rlr roa rob roi rol roo rop ror rpa rpb rpi rpl rpo rpp rpr rra rrb rri rrl rrp rrr