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

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;

int main(){
	string s;
	cin >> s;
	int n = s.size();
	string t = "SKG";
	rep(i, 0, n) {
		if(i + 2 >= n) break;
		if(s.substr(i, 3) == t) {
			cout << "No" << endl;
			return 0;
		}
	}
	rep(i, 0, n) {
		if(s[i] != '.') continue;
		rep(k, 0, 3) {
			s[i] = t[k];
			int st = max(0, i - 2);
			int f = 0;
			rep(j, st, i + 1) {
				if(j + 2 >= n) break;
				if(s.substr(j, 3) == t) {
					f = 1;
					break;
				}
			}
			if(f == 0) break;
		}
	}
	cout << "Yes" << endl;
	cout << s << endl;
}