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:
2, 9, ['9889', 'H', 'e', 'R', 'd', '8771', 'M', '5589', 'V', 'm', '8625', '6173', '8077', '1147', '1515', '8759', '5103']

Ex Output:
V9855M1778dReH


Ex Input:
4, 7, ['1247', 's', 'J', 'w', 'X', '7211', 'c']

Ex Output:
c1127Xw


Ex Input:
3, 4, ['3341', '6535', '5143', 'F', '3341']

Ex Output:

F3415