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, 11, ['d', 'd', '3453', '8245', '6639', '3287', '5797', '3497', '1017', '4911', 'H', 'c', '5347', 'W']

Ex Output:
H49111017349757973287663982453453d


Ex Input:
12, 21, ['e', 'C', '1919', '1409', 'C', '5215', '9709', '1457', 'o', '4769', 'M', '9825', 'M', '1129', '7783', 'S', 'g', '6493', 'P', '6791', 'z', 'F', 'B', 's', 'V', 'N', 'k']

Ex Output:
z6791P6493gS77831129M9825


Ex Input:
2, 7, ['7139', '9729', 'm', '4235', 'Z', '3567', 'P', 'P', 'R', 'F', '6969', 'T', 'Y', 'i']

Ex Output:

P3567Z4235m9729