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, 7, ['B', '707', '7101', 'l', 'i', 'Q', 'e', '9437', 'i', '4709', 'w', 't', '1459', 'A', 'E', '923']
[EX A]: eQil1017707B

[EX Q]: 1, 7, ['P', 'h', '1443', 'b', 'K', '2641', '3831']
[EX A]: 13831462Kb3441hP

[EX Q]: 9, 13, ['3559', '4535', 't', '6987', '5535', '1715', '9189', 'y', 'l', '9237', 'D', 'j', '4821', 'H', 'O', 'Y', 'F', '6047', 'k', '5477']
[EX A]:
1284jD7329l