#include<stdio.h>
int main(){
    char h;
    scanf("%c", &ch);
    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')){
        printf("Alphabet\n");
    }else if (ch >= '0' && ch <= '9'){
        printf("Digit\n");
    }else{
        printf("Special character\n");
    }
    return 0;
}