a-a a-b a-c aaa aab aac aae aah aap ab- aba abb abc abe abh abp ac- aca acb acc ace ach acp aea aeb aec aee aeh aep aha ahb ahc ahe ahh ahp ap- apa apb apc ape aph app b-p baa bab bac bae bah bap bba bbb bbc bbe bbh bbp bca bcb bcc bce bch bcp be- bea beb bec bee beh bep bha bhb bhc bhe bhh bhp bpa bpb bpc bpe bph bpp c-- caa cab cac cae cah cap cba cbb cbc cbe cbh cbp cca ccb ccc cce cch ccp ce- cea ceb cec cee ceh cep ch- cha chb chc che chh chp cpa cpb cpc cpe cph cpp eaa eab eac eae eah eap eba ebb ebc ebe ebh ebp ec- eca ecb ecc ece ech eea eeb eec eee eep eha ehb ehc ehe ehh ehp ep- epa epb epc epe eph epp haa hab hac hae hah hap hba hbb hbc hbe hbh hbp hca hcb hcc hce hch hcp he- hea heb hec hee heh hep hha hhb hhc hhe hhh hhp hpa hpb hpc hpe hph hpp p-p paa pab pac pae pah pap pba pbb pbc pbe pbp pca pcb pcc pce pch pcp pea peb pec pee peh pep pha phb phc phe php ppa ppb ppc ppe pph ppp