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

int main() {
    string T;
    cin >> T;

    vector<char> v(T.begin(), T.end());
    int n = T.size();
    bool yes = 1;
    for(int i = 0; i<n-2; i++){
        if(v[i] == 'S' && v[i+1] == 'K' && v[i+2] == 'G'){
            yes = 0;
            break;
        }
    }
    if(yes == 0) cout << "No";
    else{cout << "Yes" << "\n";
    for(int i = 0; i<n; i++){
        if(v[i] == '.' && v[i+1]!= 'K') v[i] = 'S';
        else if(v[i] == '.' && v[i+1] == 'K')v[i] = 'K';
        cout << v[i];
    }
    
        
    }
    
}