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.

[EX Q]: 4, 17, ['897', 'R', 'L', '201', 'Z', 'o', 'A', '9367', 'E', 'G', '6653', 'i', 'V', 'F', '9433', 'G', '8073', '5739', '7009']
[EX A]: 3708G3349FVi3566GE7639AoZ102

[EX Q]: 18, 18, ['O', '7845', 'f', '2313', 'f', '9661', 's', 'O', '6009', '6997', 'f', 'T', 'f', '6517', 'E', 'H', 'k', 'Y', 'i', '2839', '1839', '3251', 'H', '1939']
[EX A]: Y

[EX Q]: 1, 1, ['8773', '1663', '8799']
[EX A]:
3778