a-a a-b aaa aab aae aag aan aao aap aas ab- aba abb abe abg abn abo abp abs aea aeb aee aeg aen aeo aep aes ag- aga agb age agg agn ago agp ags an- ana anb ane ang ann ano anp ans aoa aob aoe aog aon aoo aop aos ap- apa apb ape apg apn apo app aps as- asa asb ase asg asn aso asp ass b-p baa bab bae bag ban bao bap bas bba bbb bbe bbg bbn bbo bbp bbs be- bea beb bee beg ben beo bep bes bga bgb bge bgg bgn bgo bgp bgs bna bnb bne bng bnn bno bnp bns boa bob boe bog bon boo bop bos bpa bpb bpe bpg bpn bpo bpp bps bsa bsb bse bsg bsn bso bsp bss eaa eab eae eag ean eao eap eas eba ebb ebe ebg ebn ebo ebp ebs eea eeb eee eeg een eeo eep ees ega egb ege egg egn ego egp egs en- ena enb ene eng enn eno enp ens eo- eoa eob eoe eog eon eoo eop eos ep- epa epb epe epg epn epo epp eps es- esa esb ese esg esn eso esp ess g-p gaa gab gae gag gan gao gap gas gba gbe gbg gbn gbo gbp gbs ge- gea geb gee geg gen geo gep ges gga ggb ggg ggn ggo ggp ggs gna gnb gne gnn gno gnp gns goa gob goe gog gon goo gop gos gpa gpb gpe gpg gpn gpo gpp gps gsa gsb gse gsg gsn gso gsp gss naa nab nae nag nan nao nap nas nba nbb nbe nbg nbn nbo nbp nbs ne- nea neb nee neg nen neo nep nes nga ngb nge ngg ngn ngo ngp ngs nna nnb nne nng nnn nno nnp nns no- noa nob noe nog non noo nop nos npa npb npe npg npn npo npp nps nsa nsb nse nsg nsn nso nsp nss oaa oab oae oag oan oao oap oas ob- oba obb obe obg obn obo obp obs oea oeb oee oeg oen oeo oep oes oga oge ogg ogn ogo ogp ogs on- ona onb one ong onn ono onp ons oo- ooa oob oog oon ooo oop oos op- opa opb ope opg opn opo opp ops os- osa osb ose osg osn oso osp oss p-p paa pab pae pag pan pao pap pas pba pbb pbe pbg pbn pbo pbp pbs pea peb pee peg pen peo pep pes pga pgb pge pgg pgn pgo pgp pgs pn- pna pnb pne png pnn pno pnp pns poa pob poe pog pon poo pop pos ppa ppb ppe ppg ppn ppo ppp pps ps- psa psb pse psg psn pso psp pss saa sab sae sag san sao sap sas sba sbb sbe sbg sbn sbo sbp sbs se- sea seb see seg sen seo sep ses sga sgb sge sgg sgn sgo sgp sgs sna snb sne sng snn sno snp sns soa sob soe sog son soo sop sos spa spb spe spg spn spo spp sps ss- ssa ssb sse ssg ssn sso ssp sss