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]: 3, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']
[EX A]: Sl1739z30843777U1127S

[EX Q]: 3, 25, ['O', 'B', 'Y', 'L', '9379', '745', '177', 'a', '4421', 'd', 't', 'C', '8539', 's', '3595', 'R', '7009', '3631', 'A', 'y', '3033', 'z', '9495', 'n', 'R', '9477', 'q']
[EX A]:
Rn5949z3303yA13639007R5953s9358Ctd1244a7715479739LY