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, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']
[EX A]: x9441W7962

[EX Q]: 4, 5, ['3001', '661', 'S', 'N', '7919']
[EX A]: 9197N

[EX Q]: 5, 6, ['9573', '831', 'h', 'k', 'B', '415', 'Y']
[EX A]:
514B