public void TestPart1Sample2() { var input = @"0: 4 1 5 1: 2 3 | 3 2 2: 4 4 | 5 5 3: 4 5 | 5 4 4: ""a"" 5: ""b"" ababbb bababa abbbab aaabbb aaaabbb".Split('\n'); var parsed = Day19.ParseInput(input); Day19.CheckRuleAtIndex(parsed.rules, "ababbb").Any(c => c == "ababbb".Length).Should().BeTrue(); }