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: 3, 8, ['b', 'y', '8779', '3949', 'c', 'a', '111', '6649']

A: 9466111ac94939778
****
Q: 3, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']

A: os
****
Q: 3, 5, ['B', 'X', 'u', '8049', '3719', '1587', '5385', '6269', 'o', '7347', 'O']

A:
91739408u
****