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: 3, 3, ['H', '7843', '2823', '529']

SOLUTION: 3282

PROBLEM: 3, 9, ['1545', '5831', '4697', 'l', '3367', 'q', '5317', 'X', '8467', 'N', 'a', '1031', 'O', '5597', 'z', 'Q', 'f', '7013', '2623', '6691', '339', '1907']

SOLUTION:
7648X7135q7633l7964