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, 20, ['m', '9539', 'y', 'E', 'E', 'C', 'y', 'M', 'G', 'N', '4167', '2753', 'e', '8259', 'c', '6333', 'k', 'c', '471', '6461', 'w', '8919', '3849', 'm', 't', '6973', 'K']

Ex Output:
6461471ck6333c8259e27534167NGMyCEEy


Ex Input:
2, 22, ['4169', '3509', '9747', '7311', 'F', '9721', 'i', '8583', 'w', '7277', '2343', 'v', '9485', '6471', '8293', '2923', 'R', '9953', '3221', 'W', '265', 'o', '8391', '473']

Ex Output:
o265W32219953R2923829364719485v23437277w8583i9721F731197473509


Ex Input:
6, 6, ['949', '8285', 'z', '3081', 't', '2203', '6593', '3719', '6841', '9475', '1365', '1749', '139', 'I']

Ex Output:

2203