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

Ex Output:
2321k2351


Ex Input:
3, 7, ['169', '1947', 'i', 'w', '8871', '9759', '5389', '3353', 'N', 'v', '665', 'R', 'q', '2323', 'd', 'N', '4211', 'A', 'A', '9571', '1129', 'W']

Ex Output:
538997598871wi


Ex Input:
4, 18, ['e', 'n', 'q', '5115', '2473', '2443', 'Z', 'x', 'F', 's', 'm', '4785', '5131', '2303', '6205', '4065', '7403', '8795', '4269']

Ex Output:

8795740340656205230351314785msFxZ244324735115