test1 (135B)
1NNCB 2 3CH -> B 4HH -> N 5CB -> H 6NH -> C 7HB -> C 8HC -> B 9HN -> C 10NN -> C 11BH -> H 12NC -> B 13NB -> B 14BN -> B 15BB -> N 16BC -> B 17CC -> N 18CN -> C 19