#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(ll i=0;i<ll(n);i++)













int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j;




	string T;
	cin >> T;

	ll n=T.size();

	if(n<=2){
		cout << "Yes" << endl;
		cout << T << endl;
		return 0;
	}

	REP(i,n-2){
		if(T[i]=='S' && T[i+1]=='K' && T[i+2]=='G'){
			cout << "No" << endl;
			return 0;
		}
	}

	ll p=-1;
	REP(i,n){
		if(T[i]!='.'){
			p=i;
			break;
		}
	}


	if(p!=-1){
		REP(i,p) T[i]='G';
	}else{
		REP(i,n) T[i]='G';
		cout << "Yes" << endl;
		cout << T << endl;
		return 0;
	}



	REP(i,n-1){

		if(T[i]=='S' && T[i+1]=='.') T[i+1]='G';
		if(T[i]=='K' && T[i+1]=='.') T[i+1]='K';
		if(T[i]=='G' && T[i+1]=='.') T[i+1]='G';
	}


	cout << "Yes" << endl;
	cout << T << endl;








	return 0;

}