class Answer {
  constructor(input) {
    this.S = input.trim();
  }

  main() {
    let a = this.S.match(/AC/g);
    if(a) {
      let b = 'AC,'.repeat(a.length).slice(0, -1);
      let ans = (this.S === b) ? 'Done!' : 'Failed...' ;
      this.dest(ans);
    }else {
      this.dest('Failed...');
    }
  }

  dest(ans) {
    console.log(ans);
  }
}
new Answer(require('fs').readFileSync('/dev/stdin', 'utf8')).main();