TASK DEFINITION: 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.
PROBLEM: 3, 4, ['19', '2669', 'v', 'd', '2221', '4219', 'A', 'P', '7499', 'z', 'm', 'l', '427', 'u']

SOLUTION: dv

PROBLEM: 1, 2, ['735', 'W', '5879', '8259']

SOLUTION: W537

PROBLEM: 26, 27, ['v', '8493', 'Z', 'J', 'N', '6317', 'j', 'q', '53', 'g', 'W', '1897', 's', '45', 'v', 'U', 'j', 'j', 'h', 'u', 'N', 'J', 'X', '5857', '7639', '8977', '6929', '1583', '2609', '4509']

SOLUTION:
92967798