-er a-a a-b aaa aab aae aah aao aap aar aas ab- aba abb abe abh abo abp abr abs aea aeb aee aeh aeo aep aer aes aha ahb ahe ahh aho ahp ahr ahs aoa aob aoe aoh aoo aop aor aos ap- apa apb ape aph apo app apr aps ar- ara arb are arh aro arp arr ars as- asa asb ase ash aso asp asr ass b-p baa bab bae bah bao bap bar bas bba bbb bbe bbh bbo bbp bbr bbs be- bea beb bee beh beo bep ber bes bha bhb bhe bhh bho bhp bhr bhs boa bob boe boh boo bop bor bos bpa bpb bpe bph bpo bpp bpr bps bra brb bre brh bro brp brr brs bsa bsb bse bsh bso bsp bsr bss eaa eab eae eah eao eap ear eas eba ebb ebe ebh ebo ebp ebr ebs eea eeb eee eeo eep eer ees eha ehb ehe ehh eho ehp ehr ehs eo- eoa eob eoe eoh eoo eop eor eos ep- epa epb epe eph epo epp epr eps era erb ere erh ero erp err ers es- esa esb ese esh eso esp esr ess haa hab hae hah hao hap har has hba hbb hbe hbh hbo hbp hbr hbs he- hea heb hee heh heo hep her hes hha hhb hhe hhh hho hhp hhr hhs hoa hob hoe hoh hoo hop hor hos hpa hpb hpe hph hpo hpp hpr hps hr- hra hrb hre hrh hro hrp hrr hrs hsa hsb hse hsh hsp hsr hss oaa oab oae oah oao oap oar oas ob- oba obb obe obh obo obp obr obs oea oeb oee oeh oeo oep oer oes oha ohe ohh oho ohp ohr ohs oo- ooa oob ooh ooo oop oor oos op- opa opb ope oph opo opp opr ops or- ora orb ore orh oro orp orr ors os- osa osb ose osh oso osp osr oss p-p paa pab pae pah pao pap par pas pba pbb pbe pbo pbp pbr pbs pea peb pee peh peo pep per pes pha phb phe pho php phr phs poa pob poe poh poo pop por pos ppa ppb ppe pph ppo ppp ppr pps pra prb pre prh pro prp prr prs ps- psa psb pse psh pso psp psr pss ra- raa rab rae rah rao rap rar ras rba rbb rbe rbh rbo rbp rbr rbs re- rea reb ree reh reo rep rer res rh- rha rhb rhe rhh rho rhp rhr rhs roa rob roe roh roo rop ror ros rpa rpb rpe rph rpo rpp rpr rps rra rrb rrh rrp rrr rrs rsa rsb rse rsh rso rsp rsr rss saa sab sae sah sao sap sar sas sba sbb sbe sbh sbo sbp sbr sbs se- sea seb see seh seo sep ser ses sh- sha shb she shh sho shp shr shs soa sob soe soh soo sop sor sos spa spb spe sph spo spp spr sps sr- sra srb sre srh sro srp srr srs ss- ssa ssb sse ssh sso ssp ssr sss