-th a-a a-b a-t aaa aab aad aah aat aav ab- aba abb abd abh abt abv ad- ada adb add adh adt adv aha ahb ahd ahh aht ahv at- ata atb atd ath att atv av- ava avb avd avh avt baa bab bad bah bat bav bba bbb bbd bbh bbt bda bdb bdd bdh bdt bdv bha bhb bhd bhh bht bhv bta btb btd bth btt btv bva bvb bvd bvh bvt bvv daa dab dad dah dat dav dba dbb dbd dbh dbt dbv dda ddb ddd ddh ddt dh- dha dhb dhd dhh dht dta dtb dtd dth dtt dtv dva dvb dvd dvh dvt haa hab had hah hat hav hba hbb hbd hbh hbt hbv hda hdb hdd hdh hdt hdv hha hhb hhd hhh hht hhv hta htb htd hth htt htv hv- hva hvb hvd hvt hvv taa tab tad tah tat tav tba tbb tbd tbh tbt tbv tda tdb tdd tdh tdt tdv th- tha thb thd thh tht thv tta ttb ttd tth ttt ttv tva tvb tvd tvh tvt v-a vaa vab vad vah vat vav vba vbd vbh vbv vdb vdd vdh vdt vdv vh- vha vhb vhd vht vta vtb vtt vtv vva vvb vvt vvv