#include <stdio.h>
#include <string.h>


int main (void)
{
    int cmp;
    char *str = "__stack_check";
    char buffer[100];

    printf("Please enter key: ");
    scanf("%99s", buffer);

    cmp = strcmp(buffer, str);
    if (cmp == 0) 
        printf("Good job.\n");
    else 
       printf("Nope.\n");
    return (0);
}