// Tower of Hanoi
hanoi(n, x, y, z) {
  var buf[10];
  if (n == 0) return;
  hanoi(n-1, x, z, y);
  writeln('Move', int2str(buf, n), ' form ', x, ' to ', y);
  hanoi(n-1, z, y, x);
}

// Main routine
main() {
  var buf[80];
  writeln('N?');
  hanoi(str2int(readln(buf)), 'A', 'C', 'B');
}