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