a-a a-b a-c aaa aab aac aae aah aap aas ab- aba abb abc abe abh abp abs ac- aca acb acc ace ach acp acs aea aeb aec aee aeh aep aes aha ahb ahc ahe ahh ahp ahs ap- apa apb apc ape aph app aps as- asa asb asc ase ash asp ass b-p baa bab bac bae bah bap bas bba bbb bbc bbe bbh bbp bbs bca bcb bcc bce bch bcp bcs be- bea beb bec bee beh bep bes bha bhb bhc bhe bhh bhp bhs bpa bpb bpc bpe bph bpp bps bsa bsb bsc bse bsh bsp bss c-- caa cab cac cae cah cap cas cba cbb cbc cbe cbh cbp cbs cca ccb ccc cce cch ccp ccs ce- cea ceb cec cee ceh cep ces ch- cha chb chc che chh chp chs cpa cpb cpc cpe cph cpp cps csa csb csc cse csh csp css eaa eab eac eae eah eap eas eba ebb ebc ebe ebh ebp ebs ec- eca ecb ecc ece ech ecs eea eeb eec eee eep ees eha ehb ehc ehe ehh ehp ehs ep- epa epb epc epe eph epp eps es- esa esb esc ese esh esp ess haa hab hac hae hah hap has hba hbb hbc hbe hbh hbp hbs hca hcb hcc hce hch hcp hcs he- hea heb hec hee heh hep hes hha hhb hhc hhe hhh hhp hhs hpa hpb hpc hpe hph hpp hps hsa hsb hsc hse hsh hsp hss p-p paa pab pac pae pah pap pas pba pbb pbc pbe pbp pbs pca pcb pcc pce pch pcp pcs pea peb pec pee peh pep pes pha phb phc phe php phs ppa ppb ppc ppe pph ppp pps ps- psa psb psc pse psh psp pss saa sab sac sae sah sap sas sba sbb sbc sbe sbh sbp sbs sca scb scc sce sch scp scs se- sea seb sec see seh sep ses sh- sha shb shc she shh shp shs spa spb spc spe sph spp sps ss- ssa ssb ssc sse ssh ssp sss