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: 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: 2, 12, ['W', 'R', 'P', '9411', '179', '5175', '7959', 'o', '4285', 'H', '7535', '3423', 'Q', '7813', '611']
Example Output: 32435357H5824o959757159711149PR

Example Input: 7, 17, ['X', 'A', '637', 'F', 'o', '5309', 'Z', '4341', 'n', 'n', 'G', 'Q', '5085', '3497', '9939', '6001', '9285', 'o', 'j']
Example Output:
58291006939979435805QGnn1434Z