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]: 2, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']
[EX A]: xm33561779m

[EX Q]: 2, 2, ['799', '3533', '7841']
[EX A]: 3353

[EX Q]: 8, 10, ['2795', '2929', '1635', '4411', '4857', '2265', '609', 'K', 'Q', '5951', '5401', '3953', 'M', 'S', 't', '1885', '2863']
[EX A]:
1595QK