import java.util.*;
import java.io.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
int[] dp = new int[1001];
dp[1] = 1;
dp[2] = 2;
dp[3] = 1;
for (int i = 4; i <= n; i++) {
dp[i] = Math.min(dp[i-1],dp[i-3]) + 1;
}
if (dp[n] % 2 == 0) {
System.out.print("CY");
} else {
System.out.print("SK");
}
}
}