In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

Ex Input:
15, 18, ['9099', '2041', '7065', '1323', '2267', '5877', 'r', 'j', '4411', 'u', 'V', '4919', '6401', '8449', 'X', 'H', 'z', 's', '2543', '4643']

Ex Output:
szHX


Ex Input:
3, 10, ['439', 'o', 'd', '4383', '6571', 'u', '2531', '5811', '9079', 'J']

Ex Output:
J907958112531u65714383d


Ex Input:
3, 6, ['5705', '545', '7455', 'i', 'o', '3787', 'O', '647', '4241', '2347', '3541', '7215', '4005', '239', 'w', 'w', 't', '8273', 's', '8037', '6027']

Ex Output:

3787oi7455