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:
5, 5, ['8095', 'D', '9477', '9307', '9355', 'U', 'y', '5197', '2691', '3061']

Ex Output:
5539


Ex Input:
4, 4, ['1445', '8439', 'X', 'k', '4577', '3359', 'M', '4089', '2729', 'q']

Ex Output:

k