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]: 16, 16, ['4793', '8319', 'F', 'L', 'W', 'f', '3003', 'P', 'w', '8231', 'J', 'D', '5091', '5577', 'w', '2211', 'Q', 'a', 'd', '3203', 'v', 'U', '7765', 'S', 'K', '2737', 'R', 'D', 'r', '5487']
[EX A]: 1122

[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]: 3, 7, ['4829', 'h', 'S', 'f', '209', 'U', '1275', '4945', 'o', 'w', 'Z', 'D', '4881', 'v', 'l', '4289', '1443', '6081', '8483', 'i', '3747', '9951', '4763', '9415', 'U', 'O']
[EX A]:
5721U902fS