In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting string. 'i' and 'j' will be non-negative, and will always have a value less than the length of A. 'i' will always be less than 'j'. Perform the operations in order, i.e., do not reverse first and then concatenate.

Ex Input:
6, 12, ['z', 'E', '6097', 'G', 'Z', 'X', '4155', 'r', 'n', 'i', '4915', 't', 'P', 'A']

Ex Output:
t5194inr5514X


Ex Input:
10, 14, ['8619', '1037', '6899', '8381', 's', '6757', 'a', '7261', '951', '3047', 'r', 'W', 'O', '31', '2943', '2351', '7637', '8501', 'K', '9131', '599', 'G', 'k', 'a', '8299', 'S', 'G']

Ex Output:
13OWr7403


Ex Input:
7, 19, ['O', '2027', 'W', '1533', '5491', 'K', 'j', 'p', '6233', 'v', '2349', 'K', 'y', '8439', 'J', '9475', 'b', '9781', '1327', '2431', '7321', 'a']

Ex Output:

72311879b5749J9348yK9432v3326pj