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, 9, ['3207', 'E', 'h', 'h', 'I', '4019', 'v', 'O', 'r', 'Q', '9685', 'I', '8665', '7037', '5181', 'v', 'W', 'a', 'p', '2959', 'f', 'H', '3121']

Ex Output:
rOv9104IhhE7023


Ex Input:
3, 5, ['z', 'w', 't', '3663', '9611', '3737', '4277']

Ex Output:
11693663t


Ex Input:
6, 9, ['8637', '3705', 'v', '6925', '1081', 'v', 'X', '2797', 'y']

Ex Output:

y7972Xv