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.

Example Input: 10, 10, ['7719', 'K', '7323', '7843', '7079', 'y', '6777', 'M', 'S', 'v', 's', '4857', 'J', '8269', 'm']
Example Output: v

Example Input: 2, 11, ['X', '2085', 'N', 'v', '5217', '27', '8089', 'V', '5201', '911', '5343', 'X', 'X', 'U', '9441', 'W', '2931', 'z', 'M', 'Z', '4647', 'c', 'R', '9231']
Example Output: 34351191025V9808727125vN5802

Example Input: 6, 12, ['4343', 'A', '1769', '1741', 'A', '9457', 'B', '6329', '7667', 'p', 'z', '9333', '9423', '7221', '3161', '1947', '6681', '8411', 'u', 'K', '4885', '6379', 'L']
Example Output:
3339zp76679236B7549