a-a a-b a-c aaa aab aac aae aaf aah aao aap aas ab- aba abb abc abe abf abh abo abp abs ac- aca acb acc ace acf ach aco acp acs aea aeb aec aee aef aeh aeo aep aes af- afa afb afc afe aff afh afo afp afs aha ahb ahc ahe ahf ahh aho ahp ahs aoa aob aoc aoe aof aoh aoo aop aos ap- apa apb apc ape apf aph apo app aps as- asa asb asc ase asf ash aso asp ass b-p baa bab bac bae baf bah bao bap bas bba bbb bbc bbe bbf bbh bbo bbp bbs bca bcb bcc bce bcf bch bco bcp bcs be- bea beb bec bee bef beh beo bep bes bfa bfb bfc bfe bff bfh bfo bfp bfs bha bhb bhc bhe bhf bhh bho bhp bhs boa bob boc boe bof boh boo bop bos bpa bpb bpc bpe bpf bph bpo bpp bps bsa bsb bsc bse bsf bsh bso bsp bss c-- caa cab cac cae caf cah cao cap cas cba cbb cbc cbe cbf cbh cbo cbp cbs cca ccb ccc cce ccf cch cco ccp ccs ce- cea ceb cec cee cef ceh ceo cep ces cfa cfb cfc cfe cff cfh cfo cfp cfs ch- cha chb chc che chf chh cho chp chs co- coa cob coc coe cof coh coo cop cos cpa cpb cpc cpe cpf cph cpo cpp cps csa csb csc cse csf csh cso csp css eaa eab eac eae eaf eah eao eap eas eba ebb ebc ebe ebf ebh ebo ebp ebs ec- eca ecb ecc ece ecf ech eco ecs eea eeb eec eee eef eeo eep ees ef- efa efb efc efe eff efh efo efp efs eha ehb ehc ehe ehf ehh eho ehp ehs eo- eoa eob eoc eoe eof eoh eoo eop eos ep- epa epb epc epe epf eph epo epp eps es- esa esb esc ese esf esh eso esp ess faa fab fac fae faf fah fao fap fas fba fbb fbc fbe fbf fbh fbo fbp fbs fca fcb fcc fce fcf fco fcp fcs fea feb fec fee fef feh feo fep fes ffa ffc ffe fff ffh ffo ffp ffs fha fhb fhc fhe fhf fhh fho fhp fhs foa fob foc foe fof foh foo fop fos fpa fpb fpc fpe fph fpo fpp fps fsa fsb fsc fse fsf fsh fso fsp fss haa hab hac hae haf hah hao hap has hba hbb hbc hbe hbf hbh hbo hbp hbs hca hcb hcc hce hcf hch hco hcp hcs he- hea heb hec hee hef heh heo hep hes hfa hfb hfc hfe hff hfh hfo hfp hfs hha hhb hhc hhe hhf hhh hho hhp hhs hoa hob hoc hoe hof hoh hoo hop hos hpa hpb hpc hpe hpf hph hpo hpp hps hsa hsb hsc hse hsf hsh hsp hss oaa oab oac oae oaf oah oao oap oas ob- oba obb obc obe obf obh obo obp obs oc- oca ocb occ ocf och oco ocp ocs oea oeb oec oee oef oeh oeo oep oes of- ofa ofb ofc ofe off ofo ofp ofs oha ohc ohe ohf ohh oho ohp ohs oo- ooa oob ooc oof ooh ooo oop oos op- opa opb opc ope opf oph opo opp ops os- osa osb osc ose osf osh oso osp oss p-p paa pab pac pae paf pah pao pap pas pba pbb pbc pbe pbf pbo pbp pbs pca pcb pcc pce pcf pch pco pcp pcs pea peb pec pee pef peh peo pep pes pfa pfb pfc pfe pff pfo pfp pfs pha phb phc phe phf pho php phs poa pob poc poe pof poh poo pop pos ppa ppb ppc ppe ppf pph ppo ppp pps ps- psa psb psc pse psf psh pso psp pss saa sab sac sae saf sah sao sap sas sba sbb sbc sbe sbf sbh sbo sbp sbs sca scb scc sce scf sch sco scp scs se- sea seb sec see sef seh seo sep ses sfa sfb sfc sfe sff sfh sfo sfp sfs sh- sha shb shc she shf shh sho shp shs soa sob soc soe sof soh soo sop sos spa spb spc spe spf sph spo spp sps ss- ssa ssb ssc sse ssf ssh sso ssp sss