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: 7, 21, ['l', '6905', 'z', 'J', '1599', 'e', 'z', '9933', 'L', '4249', '9073', '5391', '3605', '7227', 's', '9151', '6769', '1891', 'i', '2949', 'C', 'e', '5663', 'M', '6927', 'O', '1211', 'S', '8165']

C2949i189167699151s72273605539190734249L9933z