a-a a-b a-c aaa aab aac aah aap aar ab- aba abb abc abh abp abr ac- aca acb acc ach acp acr aha ahb ahc ahh ahp ahr ap- apa apb apc aph app apr ar- ara arb arc arh arp arr b-p baa bab bac bah bap bar bba bbb bbc bbh bbp bbr bca bcb bcc bch bcp bcr bha bhb bhc bhh bhp bhr bpa bpb bpc bph bpp bpr bra brb brh brp brr c-- caa cab cac cah cap car cba cbb cbc cbh cbp cbr cca ccb ccc cch ccp ccr ch- cha chb chc chh chp chr cpa cpb cpc cph cpp cpr cra crb crc crh crp crr haa hab hac hah hap har hba hbb hbc hbh hbp hbr hca hcb hcc hch hcp hcr hha hhb hhc hhh hhp hhr hpa hpb hpc hph hpp hpr hr- hra hrb hrc hrh hrp hrr p-p paa pab pac pah pap par pba pbb pbc pbp pbr pca pcb pcc pch pcp pcr pha phb phc php phr ppa ppb ppc pph ppp ppr pra prb prc prh prp prr ra- raa rab rac rah rap rar rba rbb rbc rbh rbp rbr rca rcb rcc rch rcp rcr rh- rha rhb rhc rhh rhp rhr rpa rpb rpc rph rpp rpr rra rrb rrc rrh rrp rrr