a-a a-b a-c aaa aab aac aah aam aas ab- aba abb abc abh abm abs ac- aca acb acc ach acm acs aha ahb ahc ahh ahm ahs ama amb amc amh amm ams as- asa asb asc ash asm ass baa bab bac bah bam bas bba bbb bbc bbh bbm bbs bca bcb bcc bch bcm bcs bha bhb bhc bhh bhm bhs bma bmb bmc bmh bmm bms bsa bsb bsc bsh bsm bss c-- caa cab cac cah cam cas cba cbb cbc cbh cbm cbs cca ccb ccc cch ccm ccs ch- cha chb chc chh chm chs cma cmb cmc cmh cmm cms csa csb csc csh csm css haa hab hac hah ham has hba hbb hbc hbh hbm hbs hca hcb hcc hch hcm hcs hha hhb hhc hhh hhm hhs hma hmb hmc hmh hmm hms hsa hsb hsc hsh hsm hss maa mab mac mah mam mas mba mbb mbc mbh mbm mbs mc- mca mcb mcc mch mcm mcs mha mhc mhh mhm mhs mma mmb mmc mmh mmm mms msa msb msc msh msm mss saa sab sac sah sam sas sba sbb sbc sbh sbm sbs sca scb scc sch scm scs sh- sha shb shc shh shm shs sma smb smc smh smm sms ss- ssa ssb ssc ssh ssm sss