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, 20, ['p', '1643', 'O', '5867', 'Y', 'j', '2411', 'Z', '2563', '4757', 'B', 'b', '7489', '815', 'c', '6631', '8571', '6537', 'm', 'T']
[A]: Tm735617581366c5189847bB75743652Z1142jY7685


[Q]: 1, 3, ['4101', '9767', 'q', 'Z', '6853', '3643']
[A]: q76791014


[Q]: 4, 15, ['2135', 'o', 'C', 'P', 'j', 'U', 'z', '4865', 'k', 's', '2313', '5729', '2187', '1859', '83', 'Y', 'C']
[A]:
389581781292753132sk5684zUjP