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