#include <iostream>
#include <string>

using namespace std;

bool is_u_turn(const char dir_pre, const char dir_cur)
{
    return (dir_pre == 'R' && dir_cur == 'L') ||
           (dir_pre == 'L' && dir_cur == 'R') ||
           (dir_pre == 'U' && dir_cur == 'D') ||
           (dir_pre == 'D' && dir_cur == 'U');
}

string contract(const string& path)
{
    string new_path = "";

    for (const char &dir : path) {
        if (!new_path.empty() && is_u_turn(new_path.back(), dir)) {
            new_path.pop_back();
        } else {
            new_path.push_back(dir);
        }
    }

    return new_path;
}

int main(void)
{
    string path; cin >> path;

    string new_path = contract(path);

    cout << new_path << endl;

    return 0;
}