-er a-a a-b a-c aaa aab aac aad aae aah aam aar ab- aba abb abc abd abe abh abm abr ac- aca acb acc acd ace ach acm acr ad- ada adb adc add ade adh adm adr aea aeb aec aed aee aeh aem aer aha ahb ahc ahd ahe ahh ahm ahr ama amb amc amd ame amh amm amr ar- ara arb arc ard are arh arm arr baa bab bac bad bae bah bam bar bba bbb bbc bbd bbe bbh bbm bbr bca bcb bcc bcd bce bch bcm bcr bda bdb bdc bdd bde bdh bdm bdr be- bea beb bec bed bee beh bem ber bha bhb bhc bhd bhe bhh bhm bhr bma bmb bmc bmd bme bmh bmm bmr bra brb brd bre brh brm brr c-- caa cab cac cad cae cah cam car cba cbb cbc cbd cbe cbh cbm cbr cca ccb ccc ccd cce cch ccm ccr cda cdb cdc cdd cde cdh cdm cdr ce- cea ceb cec ced cee ceh cem cer ch- cha chb chc chd che chh chm chr cma cmb cmc cmd cme cmh cmm cmr cra crb crc crd cre crh crm crr daa dab dac dad dae dah dam dar dba dbb dbc dbd dbe dbh dbm dbr dca dcb dcc dcd dce dcm dcr dda ddb ddc ddd dde ddh ddm ddr de- dea deb dec ded dee deh dem der dh- dha dhb dhc dhd dhe dhh dhm dhr dma dmb dmc dmd dme dmh dmm dmr dra drb drc drd dre drm drr eaa eab eac ead eae eah eam ear eba ebb ebc ebd ebe ebh ebm ebr ec- eca ecb ecc ecd ece ech ecm ecr ed- eda edb edc edd ede edh edm edr eea eeb eec eed eee eem eer eha ehb ehc ehd ehe ehh ehm ehr em- ema emb emc emd eme emh emm emr era erb erc erd ere erh erm err haa hab hac had hae hah ham har hba hbb hbc hbd hbe hbh hbm hbr hca hcb hcc hcd hce hch hcm hcr hda hdb hdc hdd hde hdh hdm hdr he- hea heb hec hed hee heh hem her hha hhb hhc hhd hhe hhh hhm hhr hma hmb hmc hmd hme hmh hmm hmr hr- hra hrb hrc hrd hre hrh hrm hrr m-r maa mab mac mad mae mah mam mar mba mbb mbc mbd mbe mbh mbm mbr mc- mca mcb mcc mcd mce mch mcm mcr mda mdb mdc mdd mde mdh mdm mdr mea meb mec med mee meh mem mer mha mhc mhd mhh mhm mhr mma mmb mmc mmd mme mmh mmm mmr mra mrb mrc mrd mre mrh mrm mrr ra- raa rab rac rad rae rah ram rar rba rbb rbc rbd rbe rbh rbm rbr rca rcb rcc rcd rce rch rcm rcr rda rdb rdc rdd rde rdh rdm rdr re- rea reb rec red ree reh rem rer rh- rha rhb rhc rhd rhe rhh rhm rhr rma rmb rmc rmd rme rmh rmm rmr rra rrb rrc rrd rrh rrm rrr