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:
3, 8, ['6673', '3503', 'j', 't', 'y', 'q', 'S', '2339', 'B', 'C', 'b', 'K', '3323']

Ex Output:
9332Sqytj


Ex Input:
2, 2, ['1467', 'm']

Ex Output:
m


Ex Input:
19, 21, ['6763', 'x', 'A', 'J', '7937', '9059', '5369', '711', 'Y', 'A', '4275', 'e', '7709', '2099', 'E', 'e', 'X', '2745', '2745', '4687', '8003', 'B', '1323', 'g', '2363', 'P', 'R']

Ex Output:

300878645472