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 Q]: 1, 6, ['7675', '2039', 'u', 'w', '8039', 'e', 'q']
[EX A]: e9308wu93025767

[EX Q]: 18, 20, ['1111', '8387', 'Q', 'O', 'A', 'E', '7233', 'o', '5603', 'H', '5793', 'k', '5603', 'B', 'F', 'e', 'Q', 'w', '9253', '6559']
[EX A]: 95563529w

[EX Q]: 1, 5, ['S', 'M', '9433', '3829', 'x', '9223', 'r', 'd', 'x', '5517']
[EX A]:
x92833349MS

