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]: 4, 5, ['3349', '9445', '703', 'k', '3191', '4473', 'K', '3417', '8305', '8781', 'K', 'v', 'O', 'Y', '4375', 'o']
[EX A]: 1913k

[EX Q]: 6, 6, ['9431', '6731', 'A', '5153', 'K', '1567', 'D', 'Y', 'a', 'q', 'x']
[EX A]: 7651

[EX Q]: 11, 17, ['3815', 'a', '5113', 'S', '6977', 'j', 'W', '3665', 'n', '4131', 'z', '9853', 'D', '8843', 'u', '5325', 'v', 'H', '6307', 's', '3631']
[EX A]:
v5235u3488D3589z