a-a a-b a-c aaa aab aac aah aam aan aas ab- aba abb abc abh abm abn abs ac- aca acb acc ach acm acn acs aha ahb ahc ahh ahm ahn ahs ama amb amc amh amm amn ams an- ana anb anc anh anm ann ans as- asa asb asc ash asm asn ass baa bab bac bah bam ban bas bba bbb bbc bbh bbm bbn bbs bca bcb bcc bch bcm bcn bcs bha bhb bhc bhh bhm bhs bma bmb bmc bmh bmm bmn bms bna bnb bnc bnn bns bsa bsb bsc bsh bsm bsn bss c-- caa cab cac cah cam can cas cba cbb cbc cbh cbm cbn cbs cca ccb ccc cch ccm ccn ccs ch- cha chb chc chh chm chn chs cma cmb cmc cmh cmm cmn cms cn- cna cnb cnc cnh cnm cnn cns csa csb csc csh csm csn css haa hab hac hah ham han has hba hbb hbc hbh hbm hbn hbs hca hcb hcc hch hcm hcn hcs hha hhb hhc hhh hhm hhn hhs hma hmb hmc hmh hmm hms hna hnb hnc hnh hnn hns hsa hsb hsc hsh hsm hsn hss maa mab mac mah mam man mas mba mbb mbc mbh mbm mbs mc- mca mcb mcc mch mcm mcn mcs mha mhc mhh mhm mhn mhs mma mmb mmc mmh mmm mmn mms mna mnb mnc mnm mnn mns msa msb msc msh msm msn mss naa nab nac nah nam nan nas nba nbb nbc nbm nbn nbs nca ncb ncc nch ncm ncn ncs nha nhb nhc nhh nhm nhn nhs nma nmb nmc nmh nmm nmn nms nna nnb nnc nnh nnm nnn nns nsa nsb nsc nsh nsm nsn nss saa sab sac sah sam san sas sba sbb sbc sbh sbm sbn sbs sca scb scc sch scm scn scs sh- sha shb shc shh shm shn shs sma smb smc smh smm smn sms sna snb snc snm snn sns ss- ssa ssb ssc ssh ssm ssn sss