#include<bits/stdc++.h>
using namespace std;
#define rep(i,x,y) for(int i=x;i<y;i++)
#define range(a) (a).begin(),(a).end()
#define print(A,n) rep(i,0,n){cout<<(i ? " ":"")<<A[i];}cout<<endl;
#define pprint(A,m,n) rep(j,0,m){print(A[j],n);}
const int mod=1e5;
const int size=1e5;
const long inf=1e9;
int main(){
	string s;cin>>s;
	rep(i,0,s.size()){
		if(i%3==0&&s[i]=='A') continue;
		else if(i%3==1&&s[i]=='C') continue;
		else if(i%3==2&&s[i]==',') continue;
		else{ cout<<"Failed..."<<endl; return 0; }
	}cout<<"Done!"<<endl;
}