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, 18, ['U', '6059', 'K', 's', 's', 'E', 'a', 'S', '3475', 'd', '2991', '1409', '3871', '3985', 'R', 'Y', 'Q', 't', 'h', 'U', 'z', '6513', 'W', 'X', 'f', 'V']

tQYR3985387114092991