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: 11, 20, ['4421', 'G', 'T', 'Q', 'D', '3941', '9411', '5729', '2681', 'J', '451', '6333', 'W', 'l', '1541', 'S', 'K', '7427', 'U', 'h', '1839', '7765', '1251', '1345', 'p']

hU7427KS1541lW6333451