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.

Q: 1, 1, ['Q', '2357', '6479', '7105', 'M', 'x', '6281', '9331', 'z', 't', 'N', 'O', 'n', 'K', '9575', 'w', '657', '8531', '8837', 'p', '7781']

A: Q
****
Q: 4, 10, ['6935', '8323', '6167', 'I', 'G', 'f', '303', '3387', '3257', '3069', 'q', 'r', '187', 'k', '6031', '8221', '721']

A: 960375237833303fGI
****
Q: 14, 18, ['E', 'e', 'L', 'U', 'S', 'M', 'P', '9863', 'V', '3007', '1231', 'C', '6105', 'A', '3771', 'D', 'j', '9961', 'e', '7917', '101']

A:
1699jD1773A
****