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, 18, ['S', 'S', '6525', '3017', '9729', '5747', '4409', '9501', '4083', 'f', 'X', 'B', 'u', '5967', '9949', '7227', '6993', '8105', 'n', 'C', '2131', '3105', 'd', 'E']
Example Output: 50183996722794997695uBXf

Example Input: 5, 7, ['u', '3017', '4149', 'z', '9231', 'C', '7461', 'e']
Example Output: 1647C1329

Example Input: 6, 7, ['1919', '83', 'Z', '8875', '9235', '2027', 'r', 'm']
Example Output:
r7202