// editor2
#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;
}