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.

[Q]: 1, 3, ['2119', '2237', 'O']
[A]: O73229112


[Q]: 8, 16, ['7751', 'Q', '9819', 'k', 'g', 'y', 'W', 'I', '6371', '9859', 'f', '7055', 's', 'I', 'W', '3029']
[A]: 9203WIs5507f95891736I


[Q]: 1, 20, ['3503', '1361', '8575', '1247', '805', 'y', '115', '2599', '8353', 'I', 'V', 'y', '2019', '657', 'j', '9457', 'w', '6429', '2721', 'f', '9693']
[A]:
f12729246w7549j7569102yVI35389952511y5087421575816313053