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, 2, ['5111', 'U', '441', '8381']
[EX A]: U1115

[EX Q]: 3, 9, ['Y', '9075', '2327', '1643', '655', '935', 'a', 'j', 'm']
[EX A]: mja53955634617232

[EX Q]: 27, 28, ['I', 'L', '2661', '6211', '9023', 'N', '1691', '8509', '4167', 'Q', '6849', '6277', 'f', 'F', 'm', 'K', 'U', '6741', '125', 'j', 'q', 'k', '1997', '3921', 'g', '3451', 'e', 'J', 'W', '4271']
[EX A]:
Je