a-a a-b a-c aaa aab aac aad aah aam ab- aba abb abc abd abh abm ac- aca acb acc acd ach acm ad- ada adb adc add adh adm aha ahb ahc ahd ahh ahm ama amb amc amd amh amm baa bab bac bad bah bam bba bbb bbc bbd bbh bbm bca bcb bcc bcd bch bcm bda bdb bdc bdd bdh bdm bha bhb bhc bhd bhh bhm bma bmb bmc bmd bmh bmm c-- caa cab cac cad cah cam cba cbb cbc cbd cbh cbm cca ccb ccc ccd cch ccm cda cdb cdc cdd cdh cdm ch- cha chb chc chd chh chm cma cmb cmc cmd cmh cmm daa dab dac dad dah dam dba dbb dbc dbd dbh dbm dca dcb dcc dcd dcm dda ddb ddc ddd ddh ddm dh- dha dhb dhc dhd dhh dhm dma dmb dmc dmd dmh dmm haa hab hac had hah ham hba hbb hbc hbd hbh hbm hca hcb hcc hcd hch hcm hda hdb hdc hdd hdh hdm hha hhb hhc hhd hhh hhm hma hmb hmc hmd hmh hmm maa mab mac mad mah mam mba mbb mbc mbd mbh mbm mc- mca mcb mcc mcd mch mcm mda mdb mdc mdd mdh mdm mha mhc mhd mhh mhm mma mmb mmc mmd mmh mmm