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:
9, 21, ['d', 'K', '4747', 'J', '5273', 'R', '5449', '6823', '2003', 'M', '3201', 'D', '5025', '5151', 't', '5203', '1073', 'E', 'O', 'M', 'R', '3039', '4781', 'b', '6819', '4025', '9125', '3733', 'x']

Ex Output:
RMOE10735203t51515025D3201M2003


Ex Input:
1, 3, ['2351', 'k', '2321']

Ex Output:
2321k2351


Ex Input:
3, 5, ['J', 'z', '9071', 'w', '9215', '7153', '6027', 'Q', 'i']

Ex Output:

9215w9071