#include <bits/stdc++.h>
using namespace std;
int main(void){
    int n;
    string s;
    cin>>n>>s;
    vector<vector<int>>dp(n+1,vector<int>(4,0));
    dp[0][0]=1,dp[0][1]=1;
    for(int i=0;i<n;i++){
        if(s[i]=='o'){
            if(dp[i][0])dp[i+1][1]=1;
            if(dp[i][1])dp[i+1][3]=2;
            if(dp[i][2])dp[i+1][0]=3;
            if(dp[i][3])dp[i+1][2]=4;
        }else{
            if(dp[i][0])dp[i+1][2]=1;
            if(dp[i][1])dp[i+1][0]=2;
            if(dp[i][2])dp[i+1][3]=3;
            if(dp[i][3])dp[i+1][1]=4;
        }
    }
    // for(int i=0;i<=n;i++){
    //     for(int j=0;j<4;j++)cout<<dp[i][j];
    //     cout<<endl;
    // }
    if(dp[n][0]||dp[n][2]){
        cout<<"Yes"<<endl;
        int now=(dp[n][0]?0:2);
        vector<char>ans(n);
        for(int i=n;i>0;i--){
            //cout<<now<<" "<<dp[i][now]-1<<endl;
            ans[i-1]=(now/2==(dp[i][now]-1)/2?'L':'R');
            now=(dp[i][now]-1);
        }
        for(int i=0;i<n;i++)cout<<ans[i];
        cout<<endl;
    }else{
        cout<<"No"<<endl;
    }
    return 0;
}