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: 1, 4, ['I', '5919', 'J', '6387']

SOLUTION: 7836J9195I

PROBLEM: 2, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

SOLUTION: 50469468Iz9007s

PROBLEM: 15, 19, ['9359', '9831', 'U', 'Q', '1161', '437', 'Z', 'S', 'Q', '2447', 'S', '9721', 'R', 'N', 'y', 'o', '5623', 'k', '6131', '1941', 'L', 'R']

SOLUTION:
1316k3265oy