#include<stdio.h>
#include<ctype.h>
int main()
{
    char ch;
    scanf("%c,&ch);
    if (isalpha(ch))
    {
        printf("Alphabet\n");
    }
    else if (isalpha(ch)) 
    {
        printf("Digit\n");
    }
    else
    {
        printf("Special Character\n");
    }
    return0;
}