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: 10, 11, ['913', 'z', '2821', '181', '2303', '3739', 'T', '7297', 'X', 'Z', '2169', '845', '8391', 'Y', '4639', '8493', '3929', '9819', '6537', 'r', 'G']

2169Z