a-a a-b a-c aaa aab aac aad aae aah ab- aba abb abc abd abe abh ac- aca acb acc acd ace ach ad- ada adb adc add ade adh aea aeb aec aed aee aeh aha ahb ahc ahd ahe ahh baa bab bac bad bae bah bba bbb bbc bbd bbe bbh bca bcb bcc bcd bce bch bda bdb bdc bdd bde bdh be- bea beb bec bed bee beh bha bhb bhc bhd bhe bhh c-- caa cab cac cad cae cah cba cbb cbc cbd cbe cbh cca ccb ccc ccd cce cch cda cdb cdc cdd cde cdh ce- cea ceb cec ced cee ceh ch- cha chb chc chd che chh daa dab dac dad dae dah dba dbb dbc dbd dbe dbh dca dcb dcc dcd dce dda ddb ddc ddd dde ddh de- dea deb dec ded dee deh dh- dha dhb dhc dhd dhe dhh eaa eab eac ead eae eah eba ebb ebc ebd ebe ebh ec- eca ecb ecc ecd ece ech ed- eda edb edc edd ede edh eea eeb eec eed eee eha ehb ehc ehd ehe ehh haa hab hac had hae hah hba hbb hbc hbd hbe hbh hca hcb hcc hcd hce hch hda hdb hdc hdd hde hdh he- hea heb hec hed hee heh hha hhb hhc hhd hhe hhh