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: 4, 21, ['W', '9229', '3413', 'p', '8757', '1137', '1651', '307', '7109', '4363', '9987', '8505', 'T', 'V', '4603', 't', '5139', '3365', 'q', '5737', '2707', 'r', 'j', 'D']

27075737q33655139t4603VT8505998743637109307165111378757p