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, 1, ['N', 'J']

Output: N


Input: Consider Input: 1, 4, ['B', '5591', '1237', '1519']

Output: 915173211955B


Input: Consider Input: 15, 18, ['s', 'p', '5755', 'l', 'P', 'X', 'O', '7603', 'Z', 'd', 'L', 'K', 'D', '771', 'u', '4855', 'V', 'j', 'H', '3621', '2767']


Output: jV5584u