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.

6, 8, ['4263', '4799', 'D', '4627', 'P', 'z', '8589', '5107', 'T', 'R', 'L', 'G', 'd']
70159858z

3, 8, ['s', '8395', '7689', 'x', 'P', '5953', 'X', 'D']
DX3595Px9867

7, 21, ['i', '2577', 'V', '3581', 'c', '1637', 'D', '5989', '5867', 'f', 'E', 'I', '4279', '9057', '7753', 'S', 'v', 'y', 'V', '9489', '3707', 'X', 'I', '9313', '7159', 'I']

70739849VyvS357775099724IEf76859895D