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: 1, 4, ['t', '6037', 'I', '2769', 'C']

Output: 9672I7306t


Input: Consider Input: 1, 1, ['C', '6223']

Output: C


Input: Consider Input: 1, 2, ['P', 'K']


Output: KP