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: 3, 9, ['R', 'r', '7889', '4141', '1281', 'x', '9299', '4803', 'k', '2433']

Output: k30849929x182114149887


Input: Consider Input: 2, 3, ['5191', '9077', 'a']

Output: a7709


Input: Consider Input: 6, 25, ['2033', 'k', 'P', 'u', '4881', 'G', '79', 'l', '975', 'q', '9485', '3659', '6029', 'n', 'a', '3867', '3507', '3171', 'R', 'W', 'H', 'g', 'w', '6549', 'Z', 'u', 'T', 'q', '8407']


Output: Z9456wgHWR171370537683an920695635849q579l97G