a-a a-b a-i aaa aab aad aae aai aao aap aas ab- aba abb abd abe abi abo abp abs ad- ada adb add ade adi ado adp ads aea aeb aed aee aei aeo aep aes ai- aia aib aid aie aii aio aip ais aoa aob aod aoe aoi aoo aop aos ap- apa apb apd ape api apo app aps as- asa asb asd ase asi aso asp ass b-p baa bab bad bae bai bao bap bas bba bbb bbd bbe bbi bbo bbp bbs bda bdb bdd bde bdi bdo bdp bds be- bea beb bed bee bei beo bep bes bi- bia bib bid bie bii bio bip bis boa bob bod boe boi boo bop bos bpa bpb bpd bpe bpi bpo bpp bps bsa bsb bsd bse bsi bso bsp bss daa dab dad dae dai dao dap das dba dbb dbd dbe dbi dbo dbp dbs dda ddb ddd dde ddi ddo ddp dds de- dea deb ded dee dei deo dep des di- dia dib did die dii dio dip dis doa dob dod doe doi doo dop dos dpa dpb dpd dpe dpi dpo dpp dps dsa dsb dsd dse dsi dso dsp dss eaa eab ead eae eai eao eap eas eba ebb ebd ebe ebi ebo ebp ebs ed- eda edb edd ede edi edo edp eds eea eeb eed eee eeo eep ees eia eib eid eie eii eio eip eis eo- eoa eob eod eoe eoi eoo eop eos ep- epa epb epd epe epi epo epp eps es- esa esb esd ese esi eso esp ess i-d ia- iaa iab iad iae iai iao iap ias iba ibb ibd ibe ibi ibo ibp ibs ida idb idd ide idi ido idp ids ie- iea ied iee iei iep ies iia iib iid iie iii iio iip iis io- ioa iob iod ioe ioi ioo iop ios ipa ipb ipd ipe ipi ipo ipp ips is- isa isb isd ise isi iso isp iss o-i oaa oab oad oae oai oao oap oas ob- oba obb obd obe obi obo obp obs oda odb odd ode odi odo odp ods oea oeb oed oee oei oeo oep oes oia oib oid oie oii oio oip ois oo- ooa oob ood ooi ooo oop oos op- opa opb opd ope opi opo opp ops os- osa osb osd ose osi oso osp oss p-p paa pab pad pae pai pao pap pas pba pbb pbd pbe pbi pbo pbp pbs pda pdb pdd pde pdi pdo pdp pds pea peb ped pee pei peo pep pes pia pib pid pie pii pio pip pis poa pob pod poe poi poo pop pos ppa ppb ppd ppe ppi ppo ppp pps ps- psa psb psd pse psi pso psp pss saa sab sad sae sai sao sap sas sba sbb sbd sbe sbi sbo sbp sbs sda sdb sdd sde sdi sdo sdp sds se- sea seb sed see sei seo sep ses sia sib sid sie sii sio sip sis soa sob sod soe soi soo sop sos spa spb spd spe spi spo spp sps ss- ssa ssb ssd sse ssi sso ssp sss