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.

Input: Consider Input: 4, 7, ['1247', 's', 'J', 'w', 'X', '7211', 'c']

Output: c1127Xw


Input: Consider Input: 1, 3, ['7761', '8153', '1073']

Output: 370135181677


Input: Consider Input: 2, 12, ['U', '8247', 'W', 'g', '959', '2813', '9751', 'r', '3961', '3119', 'Z', 'C', '7181']


Output: CZ91131693r15793182959gW7428