Code:
 on *:text:!change & &:#:{
  var %a = 1
  while %a <= $lines(file.txt) {
    var %line = $read(file.txt,ntw,$2,%a)
    var %line = $reptok(%line,$gettok(%line,2,32),$3,1,32)
    .write -l $+ $readn file.txt %line
    var %a = $readn
  }
}