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.

Example Input: 1, 4, ['s', 'n', '6721', 'W', 'H']
Example Output: W6721ns

Example Input: 6, 9, ['3523', '1127', '1027', '1757', '7871', 'p', '809', '7035', 'H']
Example Output: H7035809p

Example Input: 4, 6, ['1105', 'F', '6993', 'l', '7211', '7655', '9019', '9779', '4881', 'T']
Example Output:
76557211l