#include<iostream>

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