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, 18, ['2347', 'y', 'i', 'G', 'p', '821', 'l', 'K', '2571', '3897', 'I', 'X', 'o', 'w', 'F', 'h', 'o', 'k']

Ex Output:
kohFwoXI38972571Kl


Ex Input:
1, 3, ['U', '1175', 'm', 'S', 't', 's', 'o', '6357', 'G', 'x', 'H', '8917']

Ex Output:
m1175U


Ex Input:
3, 7, ['7777', '8275', 'R', '4687', 'H', 'Z', '9381']

Ex Output:

9381ZH4687R