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.

Ex Input:
1, 4, ['63', '5429', '5563', '2045', '875', '7163', '1869']

Ex Output:
54023655924536


Ex Input:
3, 7, ['P', 'P', 'H', 'r', '3563', 'n', 'M', '1577', '6453']

Ex Output:
Mn3653rH


Ex Input:
5, 14, ['I', 's', '4825', 'W', 'f', '4033', 'B', 'Y', 'V', 's', '7859', '1201', '9841', '2807', '771', '77', 'l', '2811', '8463', '6507', 's', 'g']

Ex Output:

7082148910219587sVYB3304f