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:
2, 2, ['G', '6469']

Ex Output:
6469


Ex Input:
2, 4, ['v', '807', 'C', 'n', '7213', 'l', '5943']

Ex Output:
nC807


Ex Input:
4, 10, ['203', '5385', '4199', 'g', 'N', '9603', '2799', 'l', '6087', 'N', 'X', 'A', 'G', '1405', 'x', 'z', '8175', '5657']

Ex Output:

N6087l27999603Ng