-er a-a a-b aaa aab aae aah aam aao aap aar ab- aba abb abe abh abm abo abp abr aea aeb aee aeh aem aeo aep aer aha ahb ahe ahh ahm aho ahp ahr ama amb ame amh amm amo amp amr aoa aob aoe aoh aom aoo aop aor ap- apa apb ape aph apm apo app apr ar- ara arb are arh arm aro arp arr b-p baa bab bae bah bam bao bap bar bba bbb bbe bbh bbm bbo bbp bbr be- bea beb bee beh bem beo bep ber bha bhb bhe bhh bhm bho bhp bhr bma bmb bme bmh bmm bmo bmp bmr boa bob boe boh bom boo bop bor bpa bpb bpe bph bpm bpo bpp bpr bra brb bre brh brm bro brp brr eaa eab eae eah eam eao eap ear eba ebb ebe ebh ebm ebo ebp ebr eea eeb eee eem eeo eep eer eha ehb ehe ehh ehm eho ehp ehr em- ema emb eme emh emm emo emp emr eo- eoa eob eoe eoh eom eoo eop eor ep- epa epb epe eph epm epo epp epr era erb ere erh erm ero erp err haa hab hae hah ham hao hap har hba hbb hbe hbh hbm hbo hbp hbr he- hea heb hee heh hem heo hep her hha hhb hhe hhh hhm hho hhp hhr hma hmb hme hmh hmm hmo hmp hmr hoa hob hoe hoh hom hoo hop hor hpa hpb hpe hph hpm hpo hpp hpr hr- hra hrb hre hrh hrm hro hrp hrr m-o m-r maa mab mae mah mam mao map mar mba mbb mbe mbh mbm mbo mbp mbr mea meb mee meh mem meo mep mer mha mhh mhm mho mhp mhr mma mmb mme mmh mmm mmo mmp mmr moa mob moe moh mom moo mop mor mpa mpb mpe mph mpm mpo mpp mpr mra mrb mre mrh mrm mro mrp mrr oaa oab oae oah oam oao oap oar ob- oba obb obe obh obm obo obp obr oea oeb oee oeh oem oeo oep oer oha ohe ohh ohm oho ohp ohr om- oma omb ome omh omm omo omp omr oo- ooa oob ooh oom ooo oop oor op- opa opb ope oph opm opo opp opr or- ora orb ore orh orm oro orp orr p-p paa pab pae pah pam pao pap par pba pbb pbe pbm pbo pbp pbr pea peb pee peh pem peo pep per pha phb phe phm pho php phr pma pmb pme pmh pmm pmo pmp pmr poa pob poe poh pom poo pop por ppa ppb ppe pph ppm ppo ppp ppr pra prb pre prh prm pro prp prr ra- raa rab rae rah ram rao rap rar rba rbb rbe rbh rbm rbo rbp rbr re- rea reb ree reh rem reo rep rer rh- rha rhb rhe rhh rhm rho rhp rhr rma rmb rme rmh rmm rmo rmp rmr roa rob roe roh rom roo rop ror rpa rpb rpe rph rpm rpo rpp rpr rra rrb rrh rrm rrp rrr