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