#include <stdio.h>
#include <string.h>

int main(void) {
  char s[3];
  while (scanf("%2s%*c", s)!=EOF) {
    if (strcmp(s, "AC")!=0) {
      printf("Failed...\n");
      return 0;
    }
  }
  printf("Done!\n");
  return 0;
}