-er a-a a-b a-c aaa aab aac aae aah aam aar ab- aba abb abc abe abh abm abr ac- aca acb acc ace ach acm acr aea aeb aec aee aeh aem aer aha ahb ahc ahe ahh ahm ahr ama amb amc ame amh amm amr ar- ara arb arc are arh arm arr baa bab bac bae bah bam bar bba bbb bbc bbe bbh bbm bbr bca bcb bcc bce bch bcm bcr be- bea beb bec bee beh bem ber bha bhb bhc bhe bhh bhm bhr bma bmb bmc bme bmh bmm bmr bra brb bre brh brm brr c-- caa cab cac cae cah cam car cba cbb cbc cbe cbh cbm cbr cca ccb ccc cce cch ccm ccr ce- cea ceb cec cee ceh cem cer ch- cha chb chc che chh chm chr cma cmb cmc cme cmh cmm cmr cra crb crc cre crh crm crr eaa eab eac eae eah eam ear eba ebb ebc ebe ebh ebm ebr ec- eca ecb ecc ece ech ecm ecr eea eeb eec eee eem eer eha ehb ehc ehe ehh ehm ehr em- ema emb emc eme emh emm emr era erb erc ere erh erm err haa hab hac hae hah ham har hba hbb hbc hbe hbh hbm hbr hca hcb hcc hce hch hcm hcr he- hea heb hec hee heh hem her hha hhb hhc hhe hhh hhm hhr hma hmb hmc hme hmh hmm hmr hr- hra hrb hrc hre hrh hrm hrr m-r maa mab mac mae mah mam mar mba mbb mbc mbe mbh mbm mbr mc- mca mcb mcc mce mch mcm mcr mea meb mec mee meh mem mer mha mhc mhh mhm mhr mma mmb mmc mme mmh mmm mmr mra mrb mrc mre mrh mrm mrr ra- raa rab rac rae rah ram rar rba rbb rbc rbe rbh rbm rbr rca rcb rcc rce rch rcm rcr re- rea reb rec ree reh rem rer rh- rha rhb rhc rhe rhh rhm rhr rma rmb rmc rme rmh rmm rmr rra rrb rrc rrh rrm rrr