a-a a-b a-z aaa aab aad aar aav aaz ab- aba abb abd abr abv abz ad- ada adb add adr adv adz ar- ara arb ard arr arv arz av- ava avb avd avr avz az- aza azb azd azz baa bab bad bar bav baz bba bbb bbd bbr bda bdb bdd bdr bdv bdz bra brb brd brr brv brz bva bvb bvd bvr bvv bza bzd bzr bzz daa dab dad dar dav daz dba dbb dbd dbr dbv dbz dda ddb ddd ddr ddz dra drb drd drr drv drz dva dvb dvd dvr dza dzb dzd dzr ra- raa rab rad rar rav raz rba rbb rbd rbr rda rdb rdd rdr rdv rra rrb rrd rrr rva rvb rvd rvr rvv rza rzb v-a vaa vab vad var vav vaz vba vbd vbr vbv vbz vdb vdd vdr vdv vra vrb vrd vrr vva vvb vvr vvv vvz zaa zab zad zar zav zaz zbb zbr zbv zdv zzr zzz