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: 2, 2, ['1467', 'm']

SOLUTION: m

PROBLEM: 2, 2, ['799', '3533', '7841']

SOLUTION: 3353

PROBLEM: 1, 12, ['745', 'W', 'a', '2041', 'X', 'O', '5089', '6753', 'X', 'l', '4711', '73', 'N', '6879', 'l', 's', '2707', '765', 'G', '9145', 'y', '9939', '2731', '4485']

SOLUTION:
371174lX35769805OX1402aW547