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]: 3, 5, ['w', 'i', 'X', '9493', 'g', 'K', 'h', 'X']
[A]: g3949X


[Q]: 19, 20, ['w', '4131', 'C', '719', '2961', 'Q', '4167', '1001', 'p', '965', '1153', '6881', '3361', 'H', 'f', 'V', '9393', 'x', '6091', 'B', '6757', 'U', '2619', '5649', '6447', 'D']
[A]: B1906


[Q]: 6, 8, ['D', '2863', '1257', '7271', '2769', 'Y', '1449', 'k', '2105', 'd', 'X', '4519', 'g', '2457']
[A]:
k9441Y