a-a aaa aag aar aau aav ag- aga agg agr agu agv ar- ara arg arr aru arv au- aua aug aur auv av- ava avg avr avu gaa gag gar gau gav gga ggg ggr ggu ggv gra grg grr gru grv gu- gua gug gur guu guv gva gvg gvr gvu ra- raa rag rar rau rav rga rgg rgr rgv rra rrg rrr rru rua rug rur ruu ruv rva rvg rvr rvu rvv ua- uaa uag uar uau uav uga ugg ugr ugu ur- ura urg urr uru uua uug uur uuu uva uvu uvv v-a vaa vag var vau vav vga vgg vgr vgu vra vrg vrr vru vug vur vuv vva vvg vvr vvv