#include <iostream>
using namespace std;
bool d[1001];
int main(){
	int n;
	scanf("%d", &n);
	d[1] = true;
	for (int i = 3; i <= 1000; i++){
		d[i] = false;
		if (d[i - 1] == false) d[i] = true;
		if (d[i - 3] == false) d[i] = true;
	}
	if (d[n]) printf("CY\n");
	else printf("SK");
	return 0;
}