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, 6, ['1467', 'm', '9771', '6533', 'm', 'x', 'c', 'd', '3139']

Ex Output:
xm33561779m


Ex Input:
1, 4, ['619', '9623', '5589', 'r', 'Z', '3065', 'p', '9567', '5065', '8433', '2807', 'b', '8271', 'k']

Ex Output:
r98553269916


Ex Input:
3, 7, ['y', '6549', '5341', '3275', 'Y', 'n', 'D', '5251', '5603', 'H', '7113', 'X', 'c', 'r', 'R']

Ex Output:

DnY57231435