#include <string>
#include <iostream>

using namespace std;

int main()
{
    string cur, next;
    cin >> cur;
    next = cur;
    while (1)
    {
        for (int i = 0; i < cur.length(); ++i)
        {
            if (cur[i] != 'X')
            {
                next[i] = cur[i];
            }
            else if (i == 0)
            {
                if (cur[i + 1] == 'L')
                    next[i] = 'L';
                else
                    next[i] = cur[i];
            }
            else if (i == cur.length() - 1)
            {
                if (cur[i - 1] == 'R')
                    next[i] = 'R';
                else
                    next[i] = cur[i];
            }
            else
            {
                if (cur[i - 1] == 'R' && cur[i + 1] != 'L')
                    next[i] = 'R';
                else if (cur[i + 1] == 'L' && cur[i - 1] != 'R')
                    next[i] = 'L';
                else
                    next[i] = 'X';
            }
        }
        if (next == cur)
            break;
        cur = next;
    }

    cout << cur << endl;
}