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:
4, 6, ['5237', 'U', '7073', 'K', 'R', 'g', 'D', '17', 'I', '3039']

Ex Output:
gRK


Ex Input:
12, 16, ['u', '551', 'L', 'g', 'd', '2453', 'J', 'f', '8211', 'L', '241', 'l', 'G', 'F', '9043', 'f', '3977', 'P', '4371', '7687', 'A', '8181', '5251', 't', '6837']

Ex Output:
f9043FGl


Ex Input:
8, 10, ['i', '1781', 'p', '6527', '7103', 'C', 'R', 's', 'm', 's', 'x', '2963', '387', '3163', 'p', 'A', 'E', 'o', 'H', '4747', '187', 'Y', '4011', '4249', 'J']

Ex Output:

sms