ddd ddi ddl ddm dds ddx di- did dii dil dim dis dix dl- dld dli dll dlm dls dlx dmd dmi dml dmm dms dmx dsd dsi dsl dsm dss dsx dxd dxi dxl dxs dxx i-d idd idi idl idm ids idx iid iii iil iim iis iix il- ild ili ill ilm ils ilx im- imd imi iml imm ims imx is- isd isi isl ism iss ixi ixl ldd ldi ldl ldm lds lid lii lil lim lis lix lld lli lll llm lls lmd lmi lml lmm lms lsd lsi lsl lsm lss lxd lxi lxx mdd mdi mdl mdm mds mdx mi- mid mii mil mim mis mix mld mli mll mlm mls mlx mmd mmi mml mmm mms mmx msd msi msl msm mss msx mxd mxi mxl mxs sdd sdi sdl sdm sds sid sii sil sim sis six sld sli sll slm sls slx smd smi sml smm sms smx ss- ssd ssi ssl ssm sss ssx sxi sxl sxm sxs xdi xdm xds xii xis xix xld xli xlm xls xmd xmi xml xmm xms xmx xsi xsl xsm xss xxi xxl xxx