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, 3, ['2217', 'i', '6309', '6299', 'z']

Ex Output:
9036i7122


Ex Input:
9, 13, ['z', '2819', '4327', 's', '9271', '3601', '2475', 'L', '7129', '7513', '6649', '9333', '9507', '2411', 'L', '1905', '7315', '6663', '4511', 'h', 'h', '4345', 'd', 'I']

Ex Output:
70593339946631579217


Ex Input:
2, 4, ['9237', 'x', '635', '1439', 'U']

Ex Output:

9341536x