-al -ol a-a a-b a-i aaa aab aae aai aal aao aap aas ab- aba abb abe abi abl abo abp abs aea aeb aee aei ael aeo aep aes ai- aia aib aie aii ail aio aip ais al- ala alb ale ali all alo alp als aoa aob aoe aoi aol aoo aop aos ap- apa apb ape api apl apo app aps as- asa asb ase asi asl aso asp ass b-p baa bab bae bai bal bao bap bas bba bbb bbe bbi bbl bbo bbp bbs be- bea beb bee bei bel beo bep bes bi- bia bib bie bii bil bio bip bis bla blb ble bli bll blo blp bls boa bob boe boi bol boo bop bos bpa bpb bpe bpi bpl bpo bpp bps bsa bsb bse bsi bsl bso bsp bss eaa eab eae eai eal eao eap eas eba ebb ebe ebi ebl ebo ebp ebs eea eeb eee eel eeo eep ees eia eib eie eii eil eio eip eis ela elb ele eli ell elo elp els eo- eoa eob eoe eoi eol eoo eop eos ep- epa epb epe epi epl epo epp eps es- esa esb ese esi esl eso esp ess ia- iaa iab iae iai ial iao iap ias iba ibb ibe ibi ibl ibo ibp ibs ie- iea iee iei iel iep ies iia iib iie iii iil iio iip iis il- ila ilb ile ili ill ilo ilp ils io- ioa iob ioe ioi iol ioo iop ios ipa ipb ipe ipi ipl ipo ipp ips is- isa isb ise isi isl iso isp iss l-p la- laa lab lae lai lal lao lap las lba lbb lbe lbi lbl lbo lbp lbs lea leb lee lei lel leo lep les lia lib lie lii lil lio lip lis lla llb lle lli lll llo llp lls loa lob loe loi lol loo lop los lpa lpb lpe lpi lpl lpo lpp lps lsa lsb lse lsi lsl lso lsp lss o-i oaa oab oae oai oal oao oap oas ob- oba obb obe obi obl obo obp obs oea oeb oee oei oel oeo oep oes oia oib oie oii oil oio oip ois ola olb ole oli oll olo olp ols oo- ooa oob ooi ool ooo oop oos op- opa opb ope opi opl opo opp ops os- osa osb ose osi osl oso osp oss p-p paa pab pae pai pal pao pap pas pba pbb pbe pbi pbl pbo pbp pbs pea peb pee pei pel peo pep pes pia pib pie pii pil pio pip pis pla plb ple pli pll plo plp pls poa pob poe poi pol poo pop pos ppa ppb ppe ppi ppl ppo ppp pps ps- psa psb pse psi psl pso psp pss saa sab sae sai sal sao sap sas sba sbb sbe sbi sbl sbo sbp sbs se- sea seb see sei sel seo sep ses sia sib sie sii sil sio sip sis sla slb sle sli sll slo slp sls soa sob soe soi sol soo sop sos spa spb spe spi spl spo spp sps ss- ssa ssb sse ssi ssl sso ssp sss