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]: 2, 2, ['z', '3345', 'l', '2657', 'J', '4313', 'K', '5307', '9087']
[EX A]: 5433

[EX Q]: 5, 9, ['V', 'G', '4689', 'I', '6573', 'v', '4999', 'V', 'H', 'U', '2383', '489', '8517', 'K', 'A']
[EX A]: HV9994v3756

[EX Q]: 18, 18, ['5639', '9235', 'O', 'o', '2349', 'C', '4887', '6013', 'K', '6455', 'D', '8311', 'f', '4119', '5181', '5339', 't', 'o', '2743', '4671', '5117', '2691', 'F', '7389']
[EX A]:
o