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, 3, ['U', 'U', '5201', '4581', '2943', 'B', 'j']

A: 1025U
****
Q: 7, 8, ['1601', 'M', '4289', 'n', 'r', '8973', 'F', 'Y', 'v', '3357']

A: YF
****
Q: 8, 12, ['1465', 'l', '6109', 's', '7769', '7171', '4521', 'O', '9993', 'O', '1719', '2281', '5459', 'x', '6759', 'A', 'Z', 'M']

A:
18229171O3999O
****