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:
12, 18, ['N', '9555', 'H', 'd', '7941', 'U', '1965', 'G', 'E', '6947', 'q', '2341', '7909', 'n', '8625', 'r', 'M', 'F']

Ex Output:
FMr8625n79092341


Ex Input:
8, 15, ['9515', 'Q', '9365', '8843', '1391', 'e', 'Z', 'G', '9771', 'c', 'k', '7273', 's', '7523', '1297', '1835']

Ex Output:
12977523s7273kc9771G


Ex Input:
7, 8, ['r', '8405', '9773', '6495', 'c', 'p', '7737', '8667', '8473', 'e', 'U', 'g', 'c', '3535', '5805', '7335', 'X', 'c', '8757', '1793']

Ex Output:

86677737