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.

Ex Input:
16, 17, ['E', '3657', 'O', 'B', 'V', '3761', 'v', '563', '1623', 'J', '5961', 'h', '5241', '9983', '3325', '1513', 'R']

Ex Output:
R3151


Ex Input:
1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']

Ex Output:
RJ9069R73221503P3353198c9647v794


Ex Input:
13, 21, ['5085', '73', 'H', 'L', 'b', 'g', '423', '5301', 'J', 'N', '8287', '3903', '8635', 'i', '2501', '971', '6777', '2045', '8085', 'M', 'l', '5325', '513', 'B', 'V', 't', 'i']

Ex Output:

lM5808540277761791052i5368