a-a a-b a-c aaa aab aac aad aae aah aas ab- aba abb abc abd abe abh abs ac- aca acb acc acd ace ach acs ad- ada adb adc add ade adh ads aea aeb aec aed aee aeh aes aha ahb ahc ahd ahe ahh ahs as- asa asb asc asd ase ash ass baa bab bac bad bae bah bas bba bbb bbc bbd bbe bbh bbs bca bcb bcc bcd bce bch bcs bda bdb bdc bdd bde bdh bds be- bea beb bec bed bee beh bes bha bhb bhc bhd bhe bhh bhs bsa bsb bsc bsd bse bsh bss c-- caa cab cac cad cae cah cas cba cbb cbc cbd cbe cbh cbs cca ccb ccc ccd cce cch ccs cda cdb cdc cdd cde cdh cds ce- cea ceb cec ced cee ceh ces ch- cha chb chc chd che chh chs csa csb csc csd cse csh css daa dab dac dad dae dah das dba dbb dbc dbd dbe dbh dbs dca dcb dcc dcd dce dcs dda ddb ddc ddd dde ddh dds de- dea deb dec ded dee deh des dh- dha dhb dhc dhd dhe dhh dhs dsa dsb dsc dsd dse dsh dss eaa eab eac ead eae eah eas eba ebb ebc ebd ebe ebh ebs ec- eca ecb ecc ecd ece ech ecs ed- eda edb edc edd ede edh eds eea eeb eec eed eee ees eha ehb ehc ehd ehe ehh ehs es- esa esb esc esd ese esh ess haa hab hac had hae hah has hba hbb hbc hbd hbe hbh hbs hca hcb hcc hcd hce hch hcs hda hdb hdc hdd hde hdh hds he- hea heb hec hed hee heh hes hha hhb hhc hhd hhe hhh hhs hsa hsb hsc hsd hse hsh hss saa sab sac sad sae sah sas sba sbb sbc sbd sbe sbh sbs sca scb scc scd sce sch scs sda sdb sdc sdd sde sdh sds se- sea seb sec sed see seh ses sh- sha shb shc shd she shh shs ss- ssa ssb ssc ssd sse ssh sss