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: 1, 7, ['P', 'h', '1443', 'b', 'K', '2641', '3831']
Example Output: 13831462Kb3441hP

Example Input: 4, 20, ['p', '1643', 'O', '5867', 'Y', 'j', '2411', 'Z', '2563', '4757', 'B', 'b', '7489', '815', 'c', '6631', '8571', '6537', 'm', 'T']
Example Output: Tm735617581366c5189847bB75743652Z1142jY7685

Example Input: 13, 19, ['h', 'u', 'D', '8339', 'c', 'U', '2241', '8203', 'M', 'M', 'U', '9627', 'G', 'M', '5079', '2193', '8395', '1445', '3605']
Example Output:
50635441593839129705MG