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: 6, 7, ['S', 'R', 'k', 'b', 'd', '9773', '6751']
Example Output: 67519773

Example Input: 2, 4, ['T', 'q', '6485', '9125']
Example Output: 91256485q

Example Input: 1, 2, ['57', 'p', '1123']
Example Output:
p57