#include <iostream>
#include <vector>
#include <string>
#include <sstream>

using namespace std;

int
main(void)
{
  istringstream ss("ufllffrrf");
  ss.seekg(1);
  while (ss.good()) {
    char prev, cur;
    ss >> prev;
    ss >> cur;
    cout << prev << " " << cur << endl;
  }
  
  return 0;
}