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, 12, ['f', '8665', '6205', 'L', 'y', 'P', '9351', 'k', '1387', '657', 's', 'k']
[EX A]: ks7567831k1539PyL50265668f

[EX Q]: 1, 3, ['F', 'R', 'v', 'X', '7135', 'V', '8597', '5153', 'T', '4513', 'B', '7089', 'Q', '3621', 'o', 'W', '4555', '9307', '9997', 'I', '1029', 'c', '363', 'G']
[EX A]: vRF

[EX Q]: 4, 22, ['n', '2665', '4427', '3395', 'N', 'B', 'o', '3057', 'R', 'M', 'B', '2433', 'e', 'z', 'U', 'z', 'P', 's', 'n', '2141', 'e', '4475', '8379', '6201', '1079', 'a', 'K', '9743']
[EX A]:
5744e1412nsPzUze3342BMR7503oBN5933