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: 7, 14, ['j', '2199', '6995', 't', 'U', 'C', '1589', '7061', '851', 'N', '7923', '7387', '2053', 'L', 'y', '3685', 'X', 'C', '4679', '3691', '2991', 'f']

SOLUTION: L350278373297N15816079851

PROBLEM: 2, 5, ['Y', 'O', 'Q', 'l', 'E']

SOLUTION: ElQO

PROBLEM: 3, 7, ['G', '3567', '5525', 'N', 'w', 'J', 'R', '1179', '8463', 'O', 'o', '3019', '9857', 'z', 'S', '9401', '109', 'H', '6031', 'D', '7799', '1593', '1177', 'Q', '9315', 'q', '3629', '4765', '6371']

SOLUTION:
RJwN5255