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]: 3, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']
[EX A]: x9441W7962

[EX Q]: 20, 22, ['4065', 'I', '7721', 'x', '8903', 'S', '8877', 'W', 'j', '1835', '6933', '549', '7799', '8789', 'c', 'M', '6183', '3319', 'h', '8551', 'r', '2957', 'o', 'W', '9497', 'j', 'g', '3619']
[EX A]: 7592r1558

[EX Q]: 1, 8, ['6665', '8465', 'b', '6425', 'c', '3897', 'q', '7343', 'X', '2209', 'i']
[EX A]:
3437q7983c5246b56485666