#include <iostream>
#include <vector>
#include <cassert>
using namespace std;
using ll=long long;
int main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	int n;
	string s;
	cin>>n>>s;
	assert(1<=n&&n<=200000);
	for(char c:s)assert(c=='o'||c=='x');
	vector<int> a(n);
	for(int i=0;i<n;i++)if(s[i]=='o')a[i]=1;
	{
		vector<int> b=a;
		b[0]^=1;
		int c=0;
		string ans="L";
		for(int i=1;i<n;i++){
			if(b[i-1]==(b[i]^c)){
				ans+='L';
				b[i]=(1-b[i])^c;
			}else{
				ans+='R';
				b[i]=(1-b[i])^c;
				c=1-c;
			}
		}
		if(b[n-1]==1){
			cout<<"Yes"<<endl;
			cout<<ans<<endl;
			return 0;
		}
	}
			
	{
		vector<int> b=a;
		b[0]^=1;
		int c=1;
		string ans="R";
		for(int i=1;i<n;i++){
			if(b[i-1]==(b[i]^c)){
				ans+='L';
				b[i]=(1-b[i])^c;
			}else{
				ans+='R';
				b[i]=(1-b[i])^c;
				c=1-c;
			}
		}
		if(b[n-1]==1){
			cout<<"Yes"<<endl;
			cout<<ans<<endl;
			return 0;
		}
	}
	cout<<"No"<<endl;
}