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:
4, 9, ['8189', 'M', 'Y', '2695', '3381', '3829', '117', '3843', '7469', '3611', 'e', '4127', 'V', 'X', 'V', '4535', 'M']

Ex Output:
96473483711928318335962


Ex Input:
3, 5, ['C', '4345', 'T', 't', 'U', 'p']

Ex Output:
UtT


Ex Input:
4, 7, ['5783', 'P', 'N', '35', '8903', '6009', 'f', '8299', '283', '209']

Ex Output:

f9006309853