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, 1, ['4571', '3997']
[EX A]: 1754

[EX Q]: 12, 25, ['g', '7745', '5039', 'G', '883', '409', '5807', 'M', 'm', 's', 'O', 'q', 't', '1311', '5971', '6881', '9395', '7837', '451', 'E', 'C', 'K', 'x', 'd', 'G', 's', '4225', 'V']
[EX A]: GdxKCE15473875939188617951131tq

[EX Q]: 6, 20, ['5357', 'u', '8129', '1957', '8425', 'I', 'i', 'u', '4677', 'n', 'w', '1083', 'J', 'c', 'r', '4581', '8169', '6327', '6473', '5289', 'T', '143', 'X', 'Q']
[EX A]:
98253746723696181854rcJ3801wn7764uiI