a-a a-b aaa aab aam aau aav ab- aba abb abm abu abv ama amb amm amu amv au- aua aub aum auv av- ava avb avm avu b-u baa bab bam bau bav bba bbb bbm bbu bma bmb bmm bmu bmv bua bub bum buu bva bvb bvm bvu bvv m-v maa mab mam mau mav mba mbb mbm mbu mbv mma mmb mmm mmu mmv mua mub mum muu mva mvb mvm mvv ua- uaa uab uam uau uav uba ubb ubu ubv um- uma umb umm umu uua uum uuu uva uvb uvm uvu uvv v-a vaa vab vam vau vav vba vbm vbv vm- vma vmm vmu vum vuv vva vvb vvm vvv