a-a a-b aaa aab aad aae aah aav ab- aba abb abd abe abh abv ad- ada adb add ade adh adv aea aeb aed aee aeh aev aha ahb ahd ahe ahh ahv av- ava avb avd ave avh baa bab bad bae bah bav bba bbb bbd bbe bbh bda bdb bdd bde bdh bdv be- bea beb bed bee beh bev bha bhb bhd bhe bhh bhv bva bvb bvd bve bvh bvv daa dab dad dae dah dav dba dbb dbd dbe dbh dbv dda ddb ddd dde ddh de- dea deb ded dee deh dev dh- dha dhb dhd dhe dhh dva dvb dvd dve dvh eaa eab ead eae eah eav eba ebb ebd ebe ebh ebv ed- eda edb edd ede edh eea eeb eed eee eev eha ehb ehd ehe ehh ehv eva evb evd eve evh evv haa hab had hae hah hav hba hbb hbd hbe hbh hbv hda hdb hdd hde hdh hdv he- hea heb hed hee heh hev hha hhb hhd hhe hhh hhv hv- hva hvb hvd hvv v-a v-e vaa vab vad vae vah vav vba vbd vbh vbv vdb vdd vde vdh vdv vea veb ved vee veh vh- vha vhb vhd vhe vva vvb vvv