a-a a-b a-c aaa aab aac aah aap aar aas ab- aba abb abc abh abp abr abs ac- aca acb acc ach acp acr acs aha ahb ahc ahh ahp ahr ahs ap- apa apb apc aph app apr aps ar- ara arb arc arh arp arr ars as- asa asb asc ash asp asr ass b-p baa bab bac bah bap bar bas bba bbb bbc bbh bbp bbr bbs bca bcb bcc bch bcp bcr bcs bha bhb bhc bhh bhp bhr bhs bpa bpb bpc bph bpp bpr bps bra brb brh brp brr brs bsa bsb bsc bsh bsp bsr bss c-- caa cab cac cah cap car cas cba cbb cbc cbh cbp cbr cbs cca ccb ccc cch ccp ccr ccs ch- cha chb chc chh chp chr chs cpa cpb cpc cph cpp cpr cps cra crb crc crh crp crr crs csa csb csc csh csp csr css haa hab hac hah hap har has hba hbb hbc hbh hbp hbr hbs hca hcb hcc hch hcp hcr hcs hha hhb hhc hhh hhp hhr hhs hpa hpb hpc hph hpp hpr hps hr- hra hrb hrc hrh hrp hrr hrs hsa hsb hsc hsh hsp hsr hss p-p paa pab pac pah pap par pas pba pbb pbc pbp pbr pbs pca pcb pcc pch pcp pcr pcs pha phb phc php phr phs ppa ppb ppc pph ppp ppr pps pra prb prc prh prp prr prs ps- psa psb psc psh psp psr pss ra- raa rab rac rah rap rar ras rba rbb rbc rbh rbp rbr rbs rca rcb rcc rch rcp rcr rcs rh- rha rhb rhc rhh rhp rhr rhs rpa rpb rpc rph rpp rpr rps rra rrb rrc rrh rrp rrr rrs rsa rsb rsc rsh rsp rsr rss saa sab sac sah sap sar sas sba sbb sbc sbh sbp sbr sbs sca scb scc sch scp scr scs sh- sha shb shc shh shp shr shs spa spb spc sph spp spr sps sr- sra srb src srh srp srr srs ss- ssa ssb ssc ssh ssp ssr sss