arr[0] = "foooobazbarrrrr"
arr[0, "start"] = 1, arr[0, "length"] = 15
arr[1] = "foooo"
arr[1, "start"] = 1, arr[1, "length"] = 5
arr[2] = "barrrrr"
arr[2, "start"] = 9, arr[2, "length"] = 7