Use an if statement to determine if \(S\) is red, blue, or green.

Sample code

#include <bits/stdc++.h>
using namespace std;

int main() {
	string s;
	cin >> s;
	if (s == "red") cout << "SSS\n";
	else if (s == "blue") cout << "FFF\n";
	else if (s == "green") cout << "MMM\n";
	else cout << "Unknown\n";
}