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, 11, ['7391', '6663', '477', '4991', '1033', 'c', 'X', 's', '2517', 'i', 'M', '8437', 'J']

Ex Output:
Mi7152sXc330119947743666


Ex Input:
6, 7, ['E', 'A', 'd', 'a', 'S', '851', '8465', '3205', '5169', '7097', '1679', '3875', 'B', '4761']

Ex Output:
5648158


Ex Input:
4, 9, ['8837', 'h', 'F', '3765', 'l', 'm', '4105', 'n', 'g', '683', '9467', '5293', 'e', '4155', 'f', '2791', '1751']

Ex Output:

gn5014ml5673