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