#include <iostream>
#include <ostream>
#include <ranges>
#include <algorithm>
#include <vector>
using namespace std;
using ll=long long;
int main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	int n;
	cin>>n;
	string s;
	cin>>s;
	vector<int> a(n);
	for(int i=0;i<n;i++)if(s[i]=='o')a[i]=1;
	{
		string ans="L";
		vector<int> b=a;
		int sum=0;
		b[0]=1-b[0];
		for(int i=1;i<n;i++){
			if(sum%2)b[i]=1-b[i];
			if(b[i]==b[i-1]){
				ans+='L';
			}else{
				ans+='R';
				sum++;
			}
			b[i]=1-b[i];
		}
		if(b[n-1]==1){
			cout<<"Yes"<<endl;
			cout<<ans<<endl;
			return 0;
		}
	}
				
	{
		string ans="R";
		vector<int> b=a;
		int sum=1;
		b[0]=1-b[0];
		for(int i=1;i<n;i++){
			if(sum%2)b[i]=1-b[i];
			if(b[i]==b[i-1]){
				ans+='L';
			}else{
				ans+='R';
				sum++;
			}
			b[i]=1-b[i];
		}
		if(b[n-1]==1){
			cout<<"Yes"<<endl;
			cout<<ans<<endl;
			return 0;
		}
	}
	cout<<"No"<<endl;
}