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: 10, 18, ['S', 'S', '6525', '3017', '9729', '5747', '4409', '9501', '4083', 'f', 'X', 'B', 'u', '5967', '9949', '7227', '6993', '8105', 'n', 'C', '2131', '3105', 'd', 'E']

Output: 50183996722794997695uBXf


Input: Consider Input: 1, 3, ['2217', 'i', '6309', '6299', 'z']

Output: 9036i7122


Input: Consider Input: 2, 6, ['v', 'f', 's', 'm', '3907', '4453', '6981', 'f', '4771', 'p', 'q', 'k']


Output: 35447093msf