-al -ol a-a a-b a-i aaa aab aai aal aao aap ab- aba abb abi abl abo abp ai- aia aib aii ail aio aip al- ala alb ali all alo alp aoa aob aoi aol aoo aop ap- apa apb api apl apo app b-p baa bab bai bal bao bap bba bbb bbi bbl bbo bbp bi- bia bib bii bil bio bip bla blb bli bll blo blp boa bob boi bol boo bop bpa bpb bpi bpl bpo bpp ia- iaa iab iai ial iao iap iba ibb ibi ibl ibo ibp iia iib iii iil iio iip il- ila ilb ili ill ilo ilp io- ioa iob ioi iol ioo iop ipa ipb ipi ipl ipo ipp l-p la- laa lab lai lal lao lap lba lbb lbi lbl lbo lbp lia lib lii lil lio lip lla llb lli lll llo llp loa lob loi lol loo lop lpa lpb lpi lpl lpo lpp o-i oaa oab oai oal oao oap ob- oba obb obi obl obo obp oia oib oii oil oio oip ola olb oli oll olo olp oo- ooa oob ooi ool ooo oop op- opa opb opi opl opo opp p-p paa pab pai pal pao pap pba pbb pbi pbl pbo pbp pia pib pii pil pio pip pla plb pli pll plo plp poa pob poi pol poo pop ppa ppb ppi ppl ppo ppp