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.

Q: 2, 4, ['4047', 'S', '4249', '1735', '207']

A: 53719424S
****
Q: 3, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']

A: f7964
****
Q: 9, 20, ['7795', '2081', '1691', '9335', 'd', 'Z', '3753', 'i', 'x', 'D', '121', 'N', '2305', 'T', 'O', 'D', '9057', 'c', '7595', '5447']

A:
74455957c7509DOT5032N121Dx
****