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]: 5, 6, ['7565', '6525', '7421', 'u', '303', '1815', '273', '6725', 'i']
[EX A]: 5181303

[EX Q]: 5, 8, ['9889', 'z', '895', 'W', 'j', 'K', '7047', '9723', '6281']
[EX A]: 32797407Kj

[EX Q]: 3, 17, ['3069', '3555', '1823', 'B', 's', '5151', 's', '5339', 'h', '1279', '9201', 'A', '131', 'Z', 'w', '2393', 'L', '6371', 'M', 'l']
[EX A]:
L3932wZ131A10299721h9335s1515sB3281