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]: 3, 3, ['6041', '1503', 'z', '6947', 'W', '3563', '6477', 'h', '8977', 'e', 'z', '5605', '3595', '9327', 'M', 'l', 'j', 'P', 'D', 'h', 'S', 'Q', 'o', '2539', 'a', 'J', 'd', 'k']
[EX A]: z

[EX Q]: 1, 3, ['4101', '9767', 'q', 'Z', '6853', '3643']
[EX A]: q76791014

[EX Q]: 18, 19, ['f', '6379', 'u', '1313', 'N', 'h', '3037', 'R', 'm', 'd', '4909', '3041', '9379', 'n', 'r', 'n', 'w', '6809', '3377', 'I', 'm', '9767']
[EX A]:
77339086