#include <bits/stdc++.h> 

using i64 = long long; 
using u64 = unsigned long long; 
using u32 = unsigned; 

using u128 = unsigned __int128; 
using i128 = __int128; 

void solve() {
	std::string T; std::cin >> T;

	int n = T.size();

	for(int i = 0; i < n - 2; i ++){
		std::string temp = T.substr(i, 3);
		if(temp == "SKG"){
			std::cout << "No";
			return;
		}
	}

	for(int i = 0; i < n; i ++){
		if(T[i] == '.'){
			T[i] = 'G';
		}
	}

	for(int i = 0; i < n - 2; i ++){
		std::string temp = T.substr(i, 3);
		if(temp == "SKG"){
			T[i + 2] = 'K';
		}
	}

	std::cout << "Yes\n";
	std::cout << T;
} 

int main() { 
	std::ios::sync_with_stdio(false); 
	std::cin.tie(nullptr); 

	int T = 1; 
	//std::cin >> T; 

	while (T--) { 
		solve(); 
	} 
	return 0; 
}