#include <iostream>
using namespace std;
 
 
int table[4];
bool exists_in_table(int v)
{
    for (int i = 0; i <= 4; i++) {
        if (table[i] == v) return true;
    }
    return false;
}
 
 
int main() {
  if (exists_in_table(0)) 
    cout<<"0.\n";
  if (exists_in_table(1)) 
    cout<<"1.\n";
  if (exists_in_table(2)) 
    cout<<"2.\n";
  if (exists_in_table(3)) 
    cout<<"3.\n";
  if (exists_in_table(4)) 
    cout<<"4.\n";
  if (exists_in_table(42)) 
    cout<<"42.\n";
	// your code goes here
	return 0;
}

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