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, 4, ['t', '6037', 'I', '2769', 'C']
Example Output: 9672I7306t

Example Input: 3, 20, ['x', 'S', 's', 'a', '5077', 'D', '3979', 'I', '3129', 'R', '8517', 'r', 'l', 'K', 'N', '9701', '227', 'n', '9385', 'U']
Example Output: U5839n7221079NKlr7158R9213I9793D7705as

Example Input: 4, 20, ['d', 'S', '3957', '7661', '6029', '8825', 'E', 'S', '9185', 'a', '7825', 'x', '7307', 'C', '6855', '2299', 'u', 'x', '445', 'p', 'P', 'j', 'Y', '4579', '3495', 'S', '9717']
Example Output:
p544xu99225586C7037x5287a5819SE528892061667