^(キ?ム?ラ?)(タ?ク?ヤ?)$(?!\1|\2)

^(キ?ム?)(ラ?タ?)(ク?ヤ?)$(?!\1)(?!\2)(?!\3)
^(キ?ム?)(?!.*+$\k<-1>)(ラ?タ?)(?!.*+$\k<-1>)(ク?ヤ?)(?!.*+$\k<-1>)$
^(?=(.++))(?:キ?ム?)(?!\k<-1>)(?=(.++))(?:ラ?タ?)(?!\k<-1>)(?=(.++))(?:ク?ヤ?)(?!\k<-1>)$