The random testcase has a lot of problems

same to you...

[[["a", "c", "b", "d", "e"],
["d", "c", "a", "b", "e"],
["e", "b", "d", "a", "c"],
["e", "a", "b", "c", "d"],
["b", "c", "e", "a", "d"]],
"e"],

i think this is not right