a-a a-b aaa aab aah aap aar aas ab- aba abb abh abp abr abs aha ahb ahh ahp ahr ahs ap- apa apb aph app apr aps ar- ara arb arh arp arr ars as- asa asb ash asp asr ass b-p baa bab bah bap bar bas bba bbb bbh bbp bbr bbs bha bhb bhh bhp bhr bhs bpa bpb bph bpp bpr bps bra brb brh brp brr brs bsa bsb bsh bsp bsr bss haa hab hah hap har has hba hbb hbh hbp hbr hbs hha hhb hhh hhp hhr hhs hpa hpb hph hpp hpr hps hr- hra hrb hrh hrp hrr hrs hsa hsb hsh hsp hsr hss p-p paa pab pah pap par pas pba pbb pbp pbr pbs pha phb php phr phs ppa ppb pph ppp ppr pps pra prb prh prp prr prs ps- psa psb psh psp psr pss ra- raa rab rah rap rar ras rba rbb rbh rbp rbr rbs rh- rha rhb rhh rhp rhr rhs rpa rpb rph rpp rpr rps rra rrb rrh rrp rrr rrs rsa rsb rsh rsp rsr rss saa sab sah sap sar sas sba sbb sbh sbp sbr sbs sh- sha shb shh shp shr shs spa spb sph spp spr sps sr- sra srb srh srp srr srs ss- ssa ssb ssh ssp ssr sss