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, 4, ['6193', '5871', '9871', '4821']

A: 1284178917853916
****
Q: 1, 3, ['4101', '9767', 'q', 'Z', '6853', '3643']

A: q76791014
****
Q: 2, 21, ['8095', 'c', 'c', 'r', '2869', '1885', '7587', 'V', 'i', '7509', '7673', 'c', '8317', '5949', 'W', '1487', 'y', '4059', 'E', '9605', 'Q', 'C', '1255', 'W', 'P', '59', '5201', 'i']

A:
Q5069E9504y7841W94957138c37679057iV785758819682rcc
****