#include<stdio.h>
int main()
{
    char ch;
    scanf("%c", &ch);
    if(isalpha(ch))
    {
        printf("Alphabet");
    }
    else if (isdigit(ch))
    {
    printf("Digit");
    }
    else
    {
        printf("Special character");
    }
        return 0;
 
}