In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Q: 2, 2, ['8679', 'G', '1819']

A: G
****
Q: 13, 13, ['1771', 'u', 'w', 'k', 'P', '7297', 'Y', '2223', 'X', 'u', '3067', '19', 'w', 'A', 'b', '4309', 'O', '7215', 'z', '6609', '4479', '3149', '6829', '8597', '4829']

A: w
****
Q: 18, 21, ['6533', 'X', 'c', '9679', 'r', 'f', '9155', '1043', '9515', 'y', 'Q', '3739', '445', '267', '1575', 'M', 'E', 'C', 'B', '8671', 'Y']

A:
Y1768BC
****