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: 4, 9, ['2731', '4987', '2927', '8573', 'O', '8349', '9507', 'K', '7307', 'V']

A: 7037K70599438O3758
****
Q: 3, 11, ['V', '9869', 'f', 'X', '3395', 'k', 'B', '6407', 'J', 'Y', 'B', '5067', '4041', 'g', '5145', '8983', 'o', 'D']

A: BYJ7046Bk5933Xf
****
Q: 4, 20, ['4109', 'A', '2761', 'L', 'V', 'C', 'y', 'X', '1135', '5679', 's', '1849', 't', 'Z', '5611', '9089', 'w', '271', 'G', 'U']

A:
UG172w98091165Zt9481s97655311XyCVL
****