#include<stdio.h>
int main(){
    char letter;
    int digit;
    scanf("%c",&letter);
    scanf("%d",&digit);
    if(letter>='a' && letter<='z'){
        printf("Alphabet");
    }
    else if (digit==n){
        printf("Digit");
    }
    else{
        printf("Special character");
    }
return 0;
}