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, 8, ['7991', '7999', '8575', '4211', '6003', '2483', '7877', '7249', 'K', '21']

Output: 94277787384230061124575899971997


Input: Consider Input: 1, 1, ['T', 'Y']

Output: T


Input: Consider Input: 14, 18, ['2507', '9167', 'G', 's', 'G', '8201', 'X', '4161', '4895', 'Z', '8655', '9473', '833', '2681', 'o', '3089', '5735', 'D', '7977', 'o']


Output: D53759803o1862