public void Part1()
{
var answer = Day21.Part1();
answer.Should().NotBe(-1);
answer.Should().NotBe(192);
answer.Should().NotBe(193);
answer.Should().NotBe(2416);
answer.Should().NotBe(2180);
answer.Should().BeLessThan(2417);
answer.Should().Be(2150);
}
public void Part2()
{
var answer = Day21.Part2();
answer.Should().Be("vpzxk,bkgmcsx,qfzv,tjtgbf,rjdqt,hbnf,jspkl,hdcj");
}