fff ffi ffl ffm ffs ffu ffx fif fii fil fim fis fiu fix flf fli fll flm fls flu flx fmf fmi fml fmm fms fmu fmx fsf fsi fsl fsm fss fsu fsx fuf fui ful fum fus fuu fux fxi fxm fxs fxu fxx i-f iff ifi ifl ifm ifs ifu ifx iif iii iil iim iis iiu iix il- ilf ili ill ilm ils ilu ilx im- imf imi iml imm ims imu imx is- isf isi isl ism iss isu iu- iui ium ius ixi ixl lff lfi lfl lfm lfs lfu lfx lif lii lil lim lis liu lix llf lli lll llm lls llu lmf lmi lml lmm lms lmu lsf lsi lsl lsm lss lsu luf lui lul lum lus luu lux lxi lxx m-f mff mfi mfl mfm mfs mfu mi- mif mii mil mim mis miu mix mlf mli mll mlm mls mlu mlx mmf mmi mml mmm mms mmu mmx msf msi msl msm mss msu msx muf mui mul mum mus muu mux mxi mxl mxs mxu sff sfi sfl sfm sfs sfu sfx sif sii sil sim sis siu six slf sli sll slm sls slu slx smf smi sml smm sms smu smx ss- ssf ssi ssl ssm sss ssu ssx suf sui sul sum sus suu sux sxi sxl sxm sxs sxu uff ufi ufl ufm ufs ufu ufx uif uii uil uim uis uiu ulf uli ull ulm uls ulu um- umf umi uml umm ums umu usf usi usl usm uss usu usx uum uus uuu uxf uxu xfl xfm xfs xfx xii xis xiu xix xlf xli xlm xls xmf xmi xml xmm xms xmu xmx xsi xsl xsm xss xui xul xus xxi xxl xxx