#include <stdio.h>
int main() {
  char c, f = 0;
  while((c = getchar_unlocked()) != '\n') {
    if (f) {
      if (c == 'C') { f = 0; }
      else { puts("Failed..."); return 0; }
    } else if (c == 'A') {
      f = 1;
    }
  }
  puts("Done!");
  return 0;
}