-al -ol a-a a-b a-i aaa aab aad aai aal aao aap aar aas ab- aba abb abd abi abl abo abp abr abs ad- ada adb add adi adl ado adp adr ads ai- aia aib aid aii ail aio aip air ais al- ala alb ald ali all alo alp alr als aoa aob aod aoi aol aoo aop aor aos ap- apa apb apd api apl apo app apr aps ar- ara arb ard ari arl aro arp arr ars as- asa asb asd asi asl aso asp asr ass b-p baa bab bad bai bal bao bap bar bas bba bbb bbd bbi bbl bbo bbp bbr bbs bda bdb bdd bdi bdl bdo bdp bdr bds bi- bia bib bid bii bil bio bip bir bis bla blb bld bli bll blo blp blr bls boa bob bod boi bol boo bop bor bos bpa bpb bpd bpi bpl bpo bpp bpr bps bra brb brd bri brl bro brp brr brs bsa bsb bsd bsi bsl bso bsp bsr bss daa dab dad dai dal dao dap dar das dba dbb dbd dbi dbl dbo dbp dbr dbs dda ddb ddd ddi ddl ddo ddp ddr dds di- dia dib did dii dil dio dip dir dis dl- dla dlb dld dli dll dlo dlp dlr dls doa dob dod doi dol doo dop dor dos dpa dpb dpd dpi dpl dpo dpp dpr dps dra drb drd dri drl dro drp drr drs dsa dsb dsd dsi dsl dso dsp dsr dss i-d ia- iaa iab iad iai ial iao iap iar ias iba ibb ibd ibi ibl ibo ibp ibr ibs ida idb idd idi idl ido idp idr ids iia iib iid iii iil iio iip iir iis il- ila ilb ild ili ill ilo ilp ilr ils io- ioa iob iod ioi iol ioo iop ior ios ipa ipb ipd ipi ipl ipo ipp ipr ips ir- ira irb ird iri irl iro irp irr irs is- isa isb isd isi isl iso isp isr iss l-p la- laa lab lad lai lal lao lap lar las lba lbb lbd lbi lbl lbo lbp lbr lbs lda ldb ldd ldi ldl ldo ldp ldr lds lia lib lid lii lil lio lip lir lis lla llb lld lli lll llo llp llr lls loa lob lod loi lol loo lop lor los lpa lpb lpd lpi lpl lpo lpp lpr lps lra lrb lrd lri lro lrp lrr lrs lsa lsb lsd lsi lsl lso lsp lsr lss o-i oaa oab oad oai oal oao oap oar oas ob- oba obb obd obi obl obo obp obr obs oda odb odd odi odl odo odp odr ods oia oib oid oii oil oio oip oir ois ola olb old oli oll olo olp ols oo- ooa oob ood ooi ool ooo oop oor oos op- opa opb opd opi opl opo opp opr ops or- ora orb ord ori orl oro orp orr ors os- osa osb osd osi osl oso osp osr oss p-p paa pab pad pai pal pao pap par pas pba pbb pbd pbi pbl pbo pbp pbr pbs pda pdb pdd pdi pdl pdo pdp pdr pds pia pib pid pii pil pio pip pir pis pla plb pld pli pll plo plp plr pls poa pob pod poi pol poo pop por pos ppa ppb ppd ppi ppl ppo ppp ppr pps pra prb prd pri prl pro prp prr prs ps- psa psb psd psi psl pso psp psr pss ra- raa rab rad rai ral rao rap rar ras rba rbb rbd rbi rbl rbo rbp rbr rbs rda rdb rdd rdi rdl rdo rdp rdr rds ria rib rid rii ril rio rip rir ris rla rld rli rll rlo rlp rlr rls roa rob rod roi rol roo rop ror ros rpa rpb rpd rpi rpl rpo rpp rpr rps rra rrb rrd rri rrl rrp rrr rrs rsa rsb rsd rsi rsl rso rsp rsr rss saa sab sad sai sal sao sap sar sas sba sbb sbd sbi sbl sbo sbp sbr sbs sda sdb sdd sdi sdl sdo sdp sdr sds sia sib sid sii sil sio sip sir sis sla slb sld sli sll slo slp slr sls soa sob sod soi sol soo sop sor sos spa spb spd spi spl spo spp spr sps sr- sra srb srd sri srl sro srp srr srs ss- ssa ssb ssd ssi ssl sso ssp ssr sss