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, 4, ['u', 'Z', 'e', '253', '2663', 'q', '8421', '2509', '2831', 'H']
[A]: 352


[Q]: 17, 21, ['5503', '2979', '6307', '633', 'n', '9339', '5829', '5291', '8967', 'i', '9063', '975', 'G', '9187', '3227', 'A', '3487', '8187', 'H', '6097', 'H']
[A]: H7906H78187843


[Q]: 5, 7, ['f', '4275', '4501', '8791', 'e', 'E', '4591', 'N', 'X', '6525', '3111', 'I', '6453', 'g', 'f', 'S', 'l', '1999', '9125', 'S']
[A]:
1954Ee