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, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']

Output: os


Input: Consider Input: 8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']

Output: vb


Input: Consider Input: 2, 12, ['E', '7987', 'Y', 'd', 'R', '1073', '4141', '1075', '117', '8631', 'N', 'X', 'Y', 'Z', 'l', '6753', '8145', '3991', 'i', 'M', '1869', 'Z', 'S', '6275', '4469']


Output: XN1368711570114143701RdY7897