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.

Input: Consider Input: 19, 20, ['w', '4131', 'C', '719', '2961', 'Q', '4167', '1001', 'p', '965', '1153', '6881', '3361', 'H', 'f', 'V', '9393', 'x', '6091', 'B', '6757', 'U', '2619', '5649', '6447', 'D']

Output: B1906


Input: Consider Input: 4, 10, ['L', '6587', 'q', '9569', '6203', '443', '2975', '4641', '9195', '5775', 'y', 'K', '9665']

Output: 577559191464579234430269659


Input: Consider Input: 3, 21, ['2081', '9251', 'F', 'g', '8471', '615', 'h', 'K', 'Y', 'r', 'S', 'F', 'k', '4467', 'x', 'u', '5737', '649', 'L', 'M', 'b', '4101', 's', '5235', '7335', 'a', 'E', '4555']


Output: bML9467375ux7644kFSrYKh5161748gF