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