a-a a-b a-c aaa aab aac aah aap ab- aba abb abc abh abp ac- aca acb acc ach acp aha ahb ahc ahh ahp ap- apa apb apc aph app b-p baa bab bac bah bap bba bbb bbc bbh bbp bca bcb bcc bch bcp bha bhb bhc bhh bhp bpa bpb bpc bph bpp c-- caa cab cac cah cap cba cbb cbc cbh cbp cca ccb ccc cch ccp ch- cha chb chc chh chp cpa cpb cpc cph cpp haa hab hac hah hap hba hbb hbc hbh hbp hca hcb hcc hch hcp hha hhb hhc hhh hhp hpa hpb hpc hph hpp p-p paa pab pac pah pap pba pbb pbc pbp pca pcb pcc pch pcp pha phb phc php ppa ppb ppc pph ppp