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

void caesar (int key, char buf[]);

void caesar (int key, char buf[])
{
    // your code here
}

int main (void)
{
    char message[] =
        "Gurer ner bayl gjb xvaqf bs ynathntrf: "
        "gur barf crbcyr pbzcynva nobhg naq gur barf abobql hfrf";

    // your code here

    return 0;
}