Definition: 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.
Input: 15, 22, ['2685', '6365', 'I', 'R', 'p', '5535', 'r', '8691', 'c', '8125', 'R', '5371', '4079', '4593', '4231', '9025', 'B', '495', '4773', '7797', 'm', '4049', 'C', 'o', 'a']

4049m77974773495B90254231