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.

3, 5, ['9801', '6309', '4085', 'U', 'B']
BU4085

3, 4, ['D', '7459', 'y', 'B', '1671', 'x', 'Y']
By

3, 12, ['x', '9177', 'b', '2979', '8955', 'a', '4659', 'f', '4287', '1359', '8117', 'g']

g811713594287f4659a89552979b