#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define repl(i,a,b) for(ll i=(a);i<(b);i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()

template <typename T> bool chmin(T &a,T b){if(a>b){a=b;return true;} return false;}
template <typename T> bool chmax(T &a,T b){if(a<b){a=b;return true;} return false;}


void solve(){
  string s; cin >> s;
  rep(i,0,(int)s.size()-2){
    if(s[i] == 'S' && s[i+1] == 'K' && s[i+2] == 'G'){
      cout << "No\n";
      return;
    }
  }
  rep(i,0,s.size()){
    if(s[i] == '.'){
      if(i == 0) s[i]='G';
      else{
        if(s[i-1] == 'S') s[i]='K';
        else s[i]='G';
      }
    }
  }
  cout << "Yes\n";
  cout << s << "\n";

  return;
}

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

  int T=1;
  // cin >> T;
  while(T--) solve();
}