#include<stdio.h>
#include<ctype.h> //for using isalpha() and isdigit()
int main()
{
    char ch;
    scanf(" %c",&ch);
    if((ch>='A' && ch<='Z')|| (ch>='a'&& ch<='z')) //instead this use isalpha()
    {
        printf("Alphabet");
    }
    else if (isdigit(ch))
    {
        print("Digit");
    }
    else
    {
        printf("special character");
    }
    return 0;
}