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:
7, 8, ['I', 'b', '4691', '2091', '5847', 'F', 'g', '6445', 's']

Ex Output:
6445g


Ex Input:
9, 17, ['6779', '2141', 't', 'L', '5925', 'E', 'x', '1945', 'm', 'f', '4807', 'j', '3599', 'Y', 'f', 'y', '9147', '1905', '7873', '583', '4411', '9493', 'S', 'X']

Ex Output:
9147yfY3599j4807fm


Ex Input:
9, 12, ['9153', '8977', '3027', '6151', 'E', '539', 'F', 'r', '2579', 'U', '6287', '5121', '1217', '1185', 'R', '6043', '1047', 'q', '2187', '2805']

Ex Output:

51216287U2579