void Part_two_example_two()
{
var day19 = new AdventOfCode.Year2015.Day19();
var reactions = day19.GetReactions(inputPartTwo);
var answer = day19.GetStepsToMolecule("HOHOHO", reactions.reverseReactions);
Assert.Equal(6, answer);
}
void Part_one_example_two()
{
var day19 = new AdventOfCode.Year2015.Day19();
var reactions = day19.GetReactions(inputPartOne);
var answer = day19.GetDistinctReactionCount("HOHOHO", reactions.reactions);
Assert.Equal(7, answer);
}