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

void no()
{
	printf("Nope.\n");
	exit(1);
}

void yes()
{
	printf("Good job.\n");
	exit(0);
}

int main(void)
{
	char input[31];
	char output[9];
	char char_ascii_in_chars[4];
	int char_ascii = 0;
	int inp_idx = 2;
	int out_idx = 1;
	int len = 0;

	printf("please enter key: ");
	if (scanf("%30s", input) != 1)
		no();
	if (input[0] != '4' || input[1] != '2')
		no();
	fflush(stdin);

	memset(output, 0, 9);
	output[0] = '*';
	char_ascii_in_chars[3] = '\0';
	while (strlen(output) < 8 && inp_idx < strlen(input))
	{
		char_ascii_in_chars[0] = input[inp_idx++];
		char_ascii_in_chars[1] = input[inp_idx++];
		char_ascii_in_chars[2] = input[inp_idx++];
		char_ascii = atoi(char_ascii_in_chars);
		output[out_idx++] = (char)char_ascii;
	}
	output[out_idx] = '\0';

	if (strcmp(output, "********") == 0)
		yes();
	else
		no();
}