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: 3, 20, ['p', '9453', '6043', '2525', '5311', '7563', 'h', '1257', 'A', 'y', 'U', '7773', '923', '7971', 'E', 'i', '8617', 'E', 'S', 'Y', '3541', '4169', 'G', 'w']

YSE8617iE79719237773UyA1257h7563531125256043