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, 2, ['z', '3345', 'l', '2657', 'J', '4313', 'K', '5307', '9087']

Ex Output:
5433


Ex Input:
2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']

Ex Output:
hp3935


Ex Input:
4, 15, ['T', 'B', '8437', 'R', 'j', 'B', '3357', '9107', '3283', 'N', '1253', '8827', '2845', '3173', '4939', '3473', 'f', '3335', '2835', '7339', '8671', 'X']

Ex Output:

93943713548272883521N382370197533BjR