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, ['H', '103', '7091', 'V', 'T', 'F']
[EX A]: FTV1907301H

[EX Q]: 14, 21, ['127', 'y', 'x', 'i', 'Z', 'l', '1427', 'O', '2291', 'P', '429', '4115', 'C', 's', '4065', 'M', '6453', 'C', '9475', 'Q', '6545', 'j', 'W', '7117', 'h', '7965', 'U', '5121', '3381', '4175']
[EX A]: 5456Q5749C3546M5604s

[EX Q]: 4, 9, ['r', '9073', '7803', 'z', '1009', '565', '8627', '6055', 's', '2569', '9355', '8273', 'C', '4631', 'B', 'Q', 'W', '2189', '467', 'k', '3953', 'Y', 'H', 'r', '6639']
[EX A]:
s550672685659001z