#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <cstdio>
#include <vector>
#include <cstdlib>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>

using namespace std;

/* Complete the function below to print 2 integers separated by a single space which will be your next move
   */
void nextMove(char player, vector <string> board){
	char prueba;
  	vector <string> nume;

  for(int cad = 0; cad <= 2; cad++){
    for(int car = 0; car <= 2; car++){

        prueba = board[cad].at(car);
      if(prueba == '_'){

       nume.push_back(car);
       }//end if
    }//end for
  }//end for

  cout <<nume[rand() % nume.size()];

}//end nextMove
int main() {

    char player;
    vector <string> board;

    //If player is X, I'm the first player.
    //If player is O, I'm the second player.
    cin >> player;

    //Read the board now. The board is a 3x3 array filled with X, O or _.
    for(int i=0; i<3; i++) {
		string s; cin >> s;
		board.push_back(s);
    }

	nextMove(player,board);

    return 0;
}