a-a a-b a-c aaa aab aac aad aah aan aas ab- aba abb abc abd abh abn abs ac- aca acb acc acd ach acn acs ad- ada adb adc add adh adn ads aha ahb ahc ahd ahh ahn ahs an- ana anb anc and anh ann ans as- asa asb asc asd ash asn ass baa bab bac bad bah ban bas bba bbb bbc bbd bbh bbn bbs bca bcb bcc bcd bch bcn bcs bda bdb bdc bdd bdh bds bha bhb bhc bhd bhh bhs bna bnb bnc bnd bnn bns bsa bsb bsc bsd bsh bsn bss c-- caa cab cac cad cah can cas cba cbb cbc cbd cbh cbn cbs cca ccb ccc ccd cch ccn ccs cda cdb cdc cdd cdh cdn cds ch- cha chb chc chd chh chn chs cn- cna cnb cnc cnd cnh cnn cns csa csb csc csd csh csn css daa dab dac dad dah dan das dba dbb dbc dbd dbh dbn dbs dca dcb dcc dcd dcn dcs dda ddb ddc ddd ddh ddn dds dh- dha dhb dhc dhd dhh dhs dna dnb dnc dnd dnh dnn dns dsa dsb dsc dsd dsh dsn dss haa hab hac had hah han has hba hbb hbc hbd hbh hbn hbs hca hcb hcc hcd hch hcn hcs hda hdb hdc hdd hdh hdn hds hha hhb hhc hhd hhh hhn hhs hna hnb hnc hnd hnh hnn hns hsa hsb hsc hsd hsh hsn hss naa nab nac nad nah nan nas nba nbb nbc nbd nbn nbs nca ncb ncc ncd nch ncn ncs nda ndb ndc ndd ndh ndn nds nha nhb nhc nhd nhh nhn nhs nna nnb nnc nnh nnn nns nsa nsb nsc nsd nsh nsn nss saa sab sac sad sah san sas sba sbb sbc sbd sbh sbn sbs sca scb scc scd sch scn scs sda sdb sdc sdd sdh sdn sds sh- sha shb shc shd shh shn shs sna snb snc snd snn sns ss- ssa ssb ssc ssd ssh ssn sss