i-v iii iim iir iix im- imi imm imv imx ir- iri irm irr irv irx ivi ivr ivv ivx ixi m-r m-v mi- mii mim mir miv mix mmi mmm mmr mmv mmx mri mrm mrr mrv mrx mvi mvm mvr mvv mxi mxr rii rim rir riv rix rmi rmm rmr rmv rmx rri rrm rrr rvi rvm rvr rvv rxr vi- vii vim vir viv vix vm- vmi vmm vmr vmx vri vrm vrr vvi vvm vvr vvv vxr vxv xii xiv xix xmi xmm xmr xmx xrx xvi xxi xxv xxx