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: 2, 2, ['6099', 'r']

Output: r


Input: Consider Input: 5, 10, ['u', '8019', 'o', '2667', '5815', '9411', 'G', '6805', '1231', '4593', '2271', '3409']

Output: 395413215086G11495185


Input: Consider Input: 4, 4, ['y', '7349', '9645', '5161', '9411', 'f', 'U', '8263', 'j', '747']


Output: 1615