#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;
}