TASK DEFINITION: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
PROBLEM: 21, 21, ['i', 'p', 'i', '3553', '1009', '2477', '2835', '8841', 'A', '5679', 'L', '4213', 'J', 'H', 't', '8047', 'r', 'E', '1497', 'L', 'c', '5859', 'o', 'l']

SOLUTION: c

PROBLEM: 3, 7, ['3935', '2067', 'b', 'i', '5417', 'W', '2201']

SOLUTION: 2201W5417ib

PROBLEM: 20, 23, ['Y', 't', '8061', '6921', 'l', 'r', '1055', '3207', '1857', 'o', 'I', '8507', 'u', '751', 'h', 'w', 'r', '4367', 'f', '7009', 'h', 'A', '9693', '7807', 'k', 'q']

SOLUTION:
9693Ah7009