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.

2, 6, ['Q', '4571', 'S', 's', '5669', '7689', '3335', 'C', 'J', '6565', '3031', 'G', '9817', 'O', '9691', '9069', 'u', '5965', 'R']
98679665sS1754

2, 4, ['4047', 'S', '4249', '1735', '207']
53719424S

15, 27, ['g', 'A', '5145', '5013', '725', 'h', 'v', 'C', 'x', '8049', 'F', '6159', 'w', '69', '4037', '1469', 'P', '9657', '5263', '2067', 'm', 'O', 'l', 'e', '4769', '7713', 'v', '3645', '943', 'n']

v31779674elOm760236257569P96417304