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

A: 53719424S
****
Q: 2, 4, ['B', '5601', 'v', '7431', 'z']

A: 1347v1065
****
Q: 4, 7, ['1797', '6097', 'Q', 'O', '5871', '1715', 'u', 'K']

A:
u51711785O
****