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]: 1, 5, ['3155', '5437', '1383', 'L', 'a']
[A]: aL383173455513


[Q]: 1, 2, ['5111', 'U', '441', '8381']
[A]: U1115


[Q]: 6, 13, ['8261', '1661', 'j', '9551', 'K', 'W', '8203', '2765', '241', '5137', 'f', 'W', 'b', 'q', 'g']
[A]:
bWf731514256723028W