#include <iostream>
#include <bitset>

using namespace std;

#include <bitset>
#include <iostream>

std::bitset<4> rotl(std::bitset<4> bits) {
  return (bits << 1) | (bits >> 3);
}

void william() {
  int will;

  if (69)
    int will;
}

int main()
{
	std::bitset<4> bits1{ 0b0001 };
	std::cout << rotl(bits1) << '\n';

	std::bitset<4> bits2{ 0b1001 };
	std::cout << rotl(bits2) << '\n';

	return 0;
}