-er a-a a-b aaa aab aae aah aam aar ab- aba abb abe abh abm abr aea aeb aee aeh aem aer aha ahb ahe ahh ahm ahr ama amb ame amh amm amr ar- ara arb are arh arm arr baa bab bae bah bam bar bba bbb bbe bbh bbm bbr be- bea beb bee beh bem ber bha bhb bhe bhh bhm bhr bma bmb bme bmh bmm bmr bra brb bre brh brm brr eaa eab eae eah eam ear eba ebb ebe ebh ebm ebr eea eeb eee eem eer eha ehb ehe ehh ehm ehr em- ema emb eme emh emm emr era erb ere erh erm err haa hab hae hah ham har hba hbb hbe hbh hbm hbr he- hea heb hee heh hem her hha hhb hhe hhh hhm hhr hma hmb hme hmh hmm hmr hr- hra hrb hre hrh hrm hrr m-r maa mab mae mah mam mar mba mbb mbe mbh mbm mbr mea meb mee meh mem mer mha mhh mhm mhr mma mmb mme mmh mmm mmr mra mrb mre mrh mrm mrr ra- raa rab rae rah ram rar rba rbb rbe rbh rbm rbr re- rea reb ree reh rem rer rh- rha rhb rhe rhh rhm rhr rma rmb rme rmh rmm rmr rra rrb rrh rrm rrr