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: 3, 7, ['u', '1307', 'F', '8027', 'r', '4559', 'F', 'm', '9805', '5063']
Example Output: F9554r7208F

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: 15, 15, ['6319', 'H', 'A', 'Z', '3907', 'e', '4183', 'A', 'f', '3853', '3655', '1429', 'V', '7305', 'v', 'Z', '3467']
Example Output:
v