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:
1, 2, ['U', 'G', 'N']

Ex Output:
GU


Ex Input:
2, 13, ['4737', '7213', 'O', 'E', 'L', 'f', '1347', 'x', '4083', 'd', 'p', '4259', 't', 'v']

Ex Output:
t4259pd4083x1347fLEO7213


Ex Input:
1, 5, ['O', 'G', 'B', '9735', 'I', 'B', 'Y', 'n', 'O', 'w', 'D', 'Z', 'W']

Ex Output:

I9735BGO