a-a a-b aaa aab aad aah aav ab- aba abb abd abh abv ad- ada adb add adh adv aha ahb ahd ahh ahv av- ava avb avd avh baa bab bad bah bav bba bbb bbd bbh bda bdb bdd bdh bdv bha bhb bhd bhh bhv bva bvb bvd bvh bvv daa dab dad dah dav dba dbb dbd dbh dbv dda ddb ddd ddh dh- dha dhb dhd dhh dva dvb dvd dvh haa hab had hah hav hba hbb hbd hbh hbv hda hdb hdd hdh hdv hha hhb hhd hhh hhv hv- hva hvb hvd hvv v-a vaa vab vad vah vav vba vbd vbh vbv vdb vdd vdh vdv vh- vha vhb vhd vva vvb vvv