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, 2, ['Q', '6249', 'm', 'H', 'x', 'b', 'Z', 'z', '15']

A: 9426Q
****
Q: 4, 10, ['6935', '8323', '6167', 'I', 'G', 'f', '303', '3387', '3257', '3069', 'q', 'r', '187', 'k', '6031', '8221', '721']

A: 960375237833303fGI
****
Q: 4, 6, ['6795', '8771', 'V', '205', '2333', '6969', 'W', 'c', 'j']

A:
96963332502
****