a-a a-b aaa aab aae aah aap aas ab- aba abb abe abh abp abs aea aeb aee aeh aep aes aha ahb ahe ahh ahp ahs ap- apa apb ape aph app aps as- asa asb ase ash asp ass b-p baa bab bae bah bap bas bba bbb bbe bbh bbp bbs be- bea beb bee beh bep bes bha bhb bhe bhh bhp bhs bpa bpb bpe bph bpp bps bsa bsb bse bsh bsp bss eaa eab eae eah eap eas eba ebb ebe ebh ebp ebs eea eeb eee eep ees eha ehb ehe ehh ehp ehs ep- epa epb epe eph epp eps es- esa esb ese esh esp ess haa hab hae hah hap has hba hbb hbe hbh hbp hbs he- hea heb hee heh hep hes hha hhb hhe hhh hhp hhs hpa hpb hpe hph hpp hps hsa hsb hse hsh hsp hss p-p paa pab pae pah pap pas pba pbb pbe pbp pbs pea peb pee peh pep pes pha phb phe php phs ppa ppb ppe pph ppp pps ps- psa psb pse psh psp pss saa sab sae sah sap sas sba sbb sbe sbh sbp sbs se- sea seb see seh sep ses sh- sha shb she shh shp shs spa spb spe sph spp sps ss- ssa ssb sse ssh ssp sss