#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 10000000



int main(){
	
	string S;
	cin>>S;
	bool f = true;
	for(int i=0;i<S.size();i+=3){
		if(S[i]=='A'&&S[i+1]=='C')continue;
		else{
			f=false;
		}
	}
	
	if(f){
		cout<<"Done!"<<endl;
	}
	else{
		cout<<"Failed..."<<endl;
	}
	
	return 0;
}