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:
5, 7, ['2695', 'K', 'B', 'h', 'V', '6435', 'Q', '2881', '7385', '8941']

Ex Output:
Q5346V


Ex Input:
9, 13, ['4635', '9581', '9269', 'A', '4887', 'V', '1767', '9267', 'T', '1895', '4941', 'q', '5979', '501']

Ex Output:
9795q14945981T


Ex Input:
10, 18, ['4269', 'F', '9431', '2157', 'y', '6017', 'E', '2657', 'Q', '971', '2193', 'q', 'F', 'D', 'c', 'T', '5705', '5757', '7007', '3249', '3915']

Ex Output:

75755075TcDFq3912179