#include <bits/stdc++.h>
using namespace std;

int main()
{
    int h,m;
    scanf("%d:%d",&h,&m);
    int count=h-12;
    if(m) count++;
    if(count<=0) printf("Only %02d:%02d.  Too early to Dang.",h,m);
    else for(int i=0;i<count;i++) cout<<"Dang";
    return 0;
}