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: 6, 16, ['1291', 'p', 's', '3489', 'c', 'g', '3657', '5291', '6851', '7215', '3159', '713', '6011', '6907', 'g', 'b', '9073']
A: 
bg7096110631795135127158619257563g