-al -ol a-a a-b a-i aaa aab aai aal aao aap aas ab- aba abb abi abl abo abp abs ai- aia aib aii ail aio aip ais al- ala alb ali all alo alp als aoa aob aoi aol aoo aop aos ap- apa apb api apl apo app aps as- asa asb asi asl aso asp ass b-p baa bab bai bal bao bap bas bba bbb bbi bbl bbo bbp bbs bi- bia bib bii bil bio bip bis bla blb bli bll blo blp bls boa bob boi bol boo bop bos bpa bpb bpi bpl bpo bpp bps bsa bsb bsi bsl bso bsp bss ia- iaa iab iai ial iao iap ias iba ibb ibi ibl ibo ibp ibs iia iib iii iil iio iip iis il- ila ilb ili ill ilo ilp ils io- ioa iob ioi iol ioo iop ios ipa ipb ipi ipl ipo ipp ips is- isa isb isi isl iso isp iss l-p la- laa lab lai lal lao lap las lba lbb lbi lbl lbo lbp lbs lia lib lii lil lio lip lis lla llb lli lll llo llp lls loa lob loi lol loo lop los lpa lpb lpi lpl lpo lpp lps lsa lsb lsi lsl lso lsp lss o-i oaa oab oai oal oao oap oas ob- oba obb obi obl obo obp obs oia oib oii oil oio oip ois ola olb oli oll olo olp ols oo- ooa oob ooi ool ooo oop oos op- opa opb opi opl opo opp ops os- osa osb osi osl oso osp oss p-p paa pab pai pal pao pap pas pba pbb pbi pbl pbo pbp pbs pia pib pii pil pio pip pis pla plb pli pll plo plp pls poa pob poi pol poo pop pos ppa ppb ppi ppl ppo ppp pps ps- psa psb psi psl pso psp pss saa sab sai sal sao sap sas sba sbb sbi sbl sbo sbp sbs sia sib sii sil sio sip sis sla slb sli sll slo slp sls soa sob soi sol soo sop sos spa spb spi spl spo spp sps ss- ssa ssb ssi ssl sso ssp sss