iii iim iin iis iix im- imi imm imn ims imx in- ini inm inn ins inx is- isi ism isn iss ixi ixn mi- mii mim min mis mix mmi mmm mmn mms mmx mni mnm mnn mns msi msm msn mss msx mxi mxn mxs n-i nii nim nin nis nix nmi nmm nmn nms nni nnm nnn nns nsi nsm nsn nss nsx sii sim sin sis six smi smm smn sms smx sni snm snn sns ss- ssi ssm ssn sss ssx sxi sxm sxn sxs xii xin xis xix xmi xmm xms xmx xns xsi xsm xss xxi xxx