#include<stdio.h>
int main()
{
    int isalpha,isdigit;
    scanf("%d",&isalpha)
    if (n ==isalpha)
   {
       printf("character(ch)");
   }
   else if( n ==isdigit)
   {
       printf("digit(ch)");
   }
   else
   {
   printf("this is a special character");
       
   }
return 0;
}