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.

Ex Input:
3, 5, ['5011', '1189', 'H', 'F', '3857', '2423', '4235', '4323', 'o', 'd', 'o', '7583', '7413', 'm', '3467', '2445', '8919', 'a', '27', '4887', '3771']

Ex Output:
3857FH


Ex Input:
8, 8, ['V', '2803', '7079', 'W', '1265', '7865', 's', 'F', 'H', '4231', '1777', '3189']

Ex Output:
F


Ex Input:
3, 20, ['s', '3141', '873', 'N', '463', '8693', '3035', '6709', '531', '47', '5839', '2015', 'm', '2221', '1379', 'a', '4067', '5103', '5243', 'R', '8517']

Ex Output:

R524351034067a13792221m2015583947531670930358693463N873