#include <iostream>
using namespace std;
int main(){
    char ch;
    cin >> ch;
    if(ch >= '0' && ch <= '9'){ 
        cout << "Digit";
    }
     else if((ch >= 'a' && ch <= 'z')) || (ch >= 'A' && ch <= 'Z'))
     {
         cout << "Alphabet";
     }
     else{
         cout << "special character";
     } return 0;
     }
}