a-a a-b a-i aaa aab aad aai aar aav ab- aba abb abd abi abr abv ad- ada adb add adi adr adv ai- aia aib aid aii air aiv ar- ara arb ard ari arr arv av- ava avb avd avi avr baa bab bad bai bar bav bba bbb bbd bbi bbr bda bdb bdd bdi bdr bdv bi- bia bib bid bii bir biv bra brb brd bri brr brv bva bvb bvd bvi bvr bvv daa dab dad dai dar dav dba dbb dbd dbi dbr dbv dda ddb ddd ddi ddr di- dia dib did dii dir div dra drb drd dri drr drv dva dvb dvd dvi dvr i-d i-v ia- iaa iab iad iai iar iav iba ibb ibd ibi ibr ibv ida idb idd idi idr idv iia iib iid iii iir ir- ira irb ird iri irr irv iva ivb ivd ivi ivr ivv ra- raa rab rad rai rar rav rba rbb rbd rbi rbr rda rdb rdd rdi rdr rdv ria rib rid rii rir riv rra rrb rrd rri rrr rva rvb rvd rvi rvr rvv v-a vaa vab vad vai var vav vba vbd vbi vbr vbv vdb vdd vdi vdr vdv vi- via vib vid vii vir viv vra vrb vrd vri vrr vva vvb vvi vvr vvv