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:
8, 16, ['7751', 'Q', '9819', 'k', 'g', 'y', 'W', 'I', '6371', '9859', 'f', '7055', 's', 'I', 'W', '3029']

Ex Output:
9203WIs5507f95891736I


Ex Input:
7, 18, ['s', 'a', 'q', '6573', '7757', '7229', '9149', '7563', '2171', 'L', 'F', 'S', '4337', '3071', 'Q', 'A', '6987', '2529', '2489', 'y', '359', '3065', 'h']

Ex Output:
92527896AQ17037334SFL171236579419


Ex Input:
1, 3, ['6017', 'o', '1817', 'W']

Ex Output:

7181o7106