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, 4, ['4047', 'S', '4249', '1735', '207']

A: 53719424S
****
Q: 5, 10, ['u', '8019', 'o', '2667', '5815', '9411', 'G', '6805', '1231', '4593', '2271', '3409']

A: 395413215086G11495185
****
Q: 20, 21, ['3739', '147', 'E', 'Q', '4411', 'U', 'C', 'z', 'K', '7529', '3719', 'U', '5871', 'M', 'w', 'D', 'V', 'X', 'F', 'K', 'k', '819', 't', '1597', '9721', 'o', 'E', 'N']

A:
kK
****