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

Ex Output:
Mn3653rH


Ex Input:
10, 13, ['v', '9787', '3803', 'P', 'M', '7127', '7845', '6369', 'u', '8715', 'I', '7491', '6593', '459', '1747', 'L']

Ex Output:
39561947I5178


Ex Input:
1, 7, ['679', 'm', 'x', '5441', '5081', '9469', 'E', '8327', 'V', 'r', '699', 'n', 'h', 'b', '3285', '2241', '357', 's', '7003', 's']

Ex Output:

E964918051445xm976