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: 4, 4, ['I', 'i', 'b', '2703']

A: 3072
****
Q: 10, 10, ['Z', 'Z', '2205', '7113', 'G', 'k', '973', 'I', 'n', '415', '1505']

A: 514
****
Q: 8, 9, ['l', '3389', '6297', '8543', '5903', 'R', 'K', '2483', 'y', '5639', '7291', 'E', 'z']

A:
y3842
****