a-a a-b a-c aaa aab aac aag aam aas ab- aba abb abc abg abm abs ac- aca acb acc acg acm acs ag- aga agb agc agg agm ags ama amb amc amg amm ams as- asa asb asc asg asm ass baa bab bac bag bam bas bba bbb bbc bbg bbm bbs bca bcb bcc bcg bcm bcs bga bgb bgc bgg bgm bgs bma bmb bmc bmg bmm bms bsa bsb bsc bsg bsm bss c-- caa cab cac cag cam cas cba cbb cbc cbg cbm cbs cca ccb ccc ccg ccm ccs cga cgb cgc cgg cgm cgs cma cmb cmc cmg cmm cms csa csb csc csg csm css gaa gab gac gag gam gas gba gbc gbg gbm gbs gca gcb gcc gcg gcm gcs gga ggb ggc ggg ggm ggs gma gmb gmc gmg gmm gms gsa gsb gsc gsg gsm gss maa mab mac mag mam mas mba mbb mbc mbg mbm mbs mc- mca mcb mcc mcg mcm mcs mga mgb mgc mgm mgs mma mmb mmc mmg mmm mms msa msb msc msg msm mss saa sab sac sag sam sas sba sbb sbc sbg sbm sbs sca scb scc scg scm scs sga sgb sgc sgg sgm sgs sma smb smc smg smm sms ss- ssa ssb ssc ssg ssm sss