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, 3, ['4601', '1107', 'R']

Ex Output:
R7011


Ex Input:
18, 22, ['I', '4687', 'V', 'y', 'U', '2255', '6971', '793', 'W', 'O', '3233', '5061', '6355', 'X', 'U', '8435', 'e', 'z', 'u', '6055', 'd', '1493', 'e', '4453', 'X']

Ex Output:
3941d5506uz


Ex Input:
5, 8, ['9177', '5511', 'L', '7011', 'b', '3651', '2781', '8035', '1707', '7773', 'B', 'a', 'c', '9291', 'g', '6725', '8055']

Ex Output:

530818721563b