#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
	string S;
	cin>>S;
	char *p=(char*)S.c_str();
	while (*p!='\0'){
		if (*p==','){
			p++;
			continue;
		}
		if (*p=='A' && *(p+1)=='C'){
			p+=2;
			continue;
		}
		cout<<"Failed..."<<endl;
		return 0;
	}
	cout<<"Done!"<<endl;
	return 0;
}