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: 14, 20, ['9655', 'o', 's', 'o', '3915', 'b', '7517', 'Q', 'I', '3313', 'z', 'O', 'Y', 'p', 'a', 'z', 't', 'b', 'T', '2621']

2621Tbtzap