f--k ffff ffii ffss fftf fiff fifi fift fiii fiki fisi fisk fiss fist fiti fits fitt fsfi fssf ftii ifis ifit iiii iiis iiit iisi iist iitt ikki isis isit iskf issf issi isss isti ists itif itis itsf itsi ittf kfff kffk kfis kfit kfsi kfsk kfst kfti kftk kftt kiff kifs kift kiii kiik kiis kiit kikf kiki kikk kikt kisf kisi kisk kiss kist kiti kits kitt kkfi kkfs kkft kkik kkit kkkk kksf kksi kkss kkst kktk kkts ksfi ksft ksif ksii ksik ksis ksit kskf kskk ksks kssi ksss ksst ksti kstk ksts kstt ktfi ktfs ktik ktis ktkk ktks ktkt ktsf ktst kttf ktti kttk ktts kttt s-ii sfss sfts siff sift siik siit siki siks sisi sisk siss sist sit- siti sits sitt skif skik skis skit skss ssis ssit sssf sssi ssss ssts stif stik stis stit stks stsf stsi stss tfsi tfss tiff tift tiit tiki tisi tiss tist titi tits titt tkts tsis tsks tssf tssi tsst tsts ttff ttss tttt