#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
#include <iomanip>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 

int main()
{
  string c;
  ll num;
  ll a[4];
  
  for( ll i = 1 ; i <= 3 ; i++ ){

    cin >> c;
    
    if( c == "?" ){

      num = i;

    } else {

      a[i] = stoi( c );

    }
    
  }
  
  for( ll j = 1 ; j < 5 ; j += 3 ){

    a[num] = j;

    if(
       ( a[1] < a[2] && a[3] < a[2] ) ||
       ( a[2] < a[1] && a[2] < a[3] )

       ){

      cout << j;

    }

  }

  cout << endl;
  return 0;

}