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, ['3421', '6129', '593', '203', '2731', '1393', '9739', '1087', '3453', '1389', 'W', 'D', 'b', '9261']

Output: 937939311372302


Input: Consider Input: 1, 2, ['S', 'm', 'j', '6193', '79', '9401', '2469', '7919', '9563', 'l', 'm', 'A', '983', 'M', '6661']

Output: mS


Input: Consider Input: 9, 11, ['m', 'r', '5241', 'x', 'Q', 'f', '1167', '1869', '4753', 'g', 'y', 'M', '7109', '2177', 'h', 'K', '5481', '9731', 'u', 'K', 'E', 't', '4867', '4539', '7943', 'W']


Output: yg3574