f--k ffff ffii ffss fiff fifi fiii fiil fiki fili filk fill fils fisi fisk fiss fixx flii flik flis flix fsfi fsix fssf ifil ifis iiii iiis iisi ikki ilis ilki ilks ill- illi ills ilxx isil isis iskf isls issf issi isss ixil ixxi kfff kffk kffx kfil kfis kfix kfkx kflf kfli kfll kfls kflx kfsi kfsk kfxf kfxi kfxl kfxs kfxx kiff kifl kifs kifx kiii kiik kiis kiix kikf kiki kikk kikx kili kilk kill kilx kisf kisi kisk kisl kiss kisx kixi kixk kixl kixs kixx kkfi kkfs kkik kkix kkkk kklf kkli kkll kkls kklx kksf kksi kkss kkxk kkxl kkxs kkxx klff klfi klfx klif klik klil klis klix klkk klkl klks klkx kllk klls klsf klsi klsx klxk klxx ksfi ksfx ksif ksii ksik ksil ksis ksix kskf kskk ksks kskx ksli kslk ksll kssi kssl ksss kssx kxff kxii kxix kxkk kxks kxkx kxli kxll kxls kxlx kxss kxxf kxxi kxxk kxxl kxxx liff lifl lifx liii liis lili lill lils lisi lisk liss lixi lkfs llks llll lxii lxis lxxi lxxx s-ii sfls sfss siff sifl siik siki siks sil- silf sili silk sill sils sisi sisk siss sixx skif skik skil skis skix skss sl-i slik ssfl ssis sssf sssi ssss x-fi xiii xil- xili xill xisi xixi xlii xlix xsil xxii xxix xxxi xxxx