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:
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, 2, ['2475', '621']

Ex Output:
621


Ex Input:
9, 16, ['5455', '2109', 'Y', '4531', 'w', '4303', 'h', '8511', 'K', '8401', 't', '5515', '2451', 'r', '2125', 'U', '9411', 'C', 'K', 'C', '5803', 'x']

Ex Output:

U2125r24515515t8401K