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.

Q: 8, 21, ['7449', 'R', '469', 'm', 'A', '817', '9583', '239', 'n', '3597', 'C', '6853', '2745', '3827', '5775', 'x', '3875', '7503', '8903', '9679', '819']

A: 8199679890375033875x5775382727456853C3597n239
****
Q: 1, 2, ['w', '7605']

A: 7605w
****
Q: 5, 20, ['e', 'x', '5541', 'D', '2241', '5507', '2225', '6871', 'l', 'f', 'K', 'C', '1787', 'v', 's', 'a', '5349', 't', '7069', 'a', 'J', 'k', '9879', '7389', '4775', '7257']

A:
a7069t5349asv1787CKfl6871222555072241
****