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]: 21, 24, ['t', '1315', '1977', '8701', 'w', '2899', '9389', 'c', 'F', '2949', '9591', 'Y', '3127', '5887', 'D', '6527', 'I', '3229', '6585', '5375', '6289', 'j', '1775', 'n', 'O', '4741']
[EX A]: n5771j9826

[EX Q]: 22, 29, ['7033', 'L', '8085', '9405', 'w', '9699', 'Y', 'w', 'J', '5543', '3967', 'B', '7289', '2385', '9123', 'M', 'o', '3055', 'b', '7955', '5857', 'N', 'l', '5075', 'H', '6681', '3289', '2135', '3593']
[EX A]: 3953531298231866H5705lN

[EX Q]: 4, 11, ['6681', '4115', 'V', 'O', '3087', '4183', 'Z', 'J', 'c', '6481', 'n', '7153', '6849', 'U']
[EX A]:
n1846cJZ38147803O