#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define int long long
#define lowbit(x) (x&(-x))
#define pll pair<int,int>

int dx[] = {-1,1,0,0,-1,-1,1,1};
int dy[] = {0,0,-1,1,-1,1,-1,1};

const int N = 2e6+10;
const int mod =	998244353;
const ld eps = 1e-6;

void solve(){
    int n;
    string s;
    cin>>n;
    cin>>s;
    s = " " + s + " ";
    int ans = 0;
    for(int i=1;i<=n;i++){
        if(s[i]=='.'){
            s[i] = 'C';
        }
    }
    for(int i=1;i<=n;i++){
        if(s[i]=='L'){
            if(s[i-1]=='C')s[i-1] = '.';
            if(s[i+1]=='C')s[i+1] = '.';
        }
    }
    cout<<s.substr(1,n);
}
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    int T = 1;
    // cin>>T;
    while(T--){
        solve();
    }
    return 0; 
}
/*

/\_/\
(= ._.)
/ >  \>
*/