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: 4, 9, ['a', 'B', '1855', '5817', '437', 'Y', '7959', '2203', 'b', '945', '2861', 'F', '6725']

SOLUTION: b22037959Y4375817

PROBLEM: 1, 2, ['7921', 'Q']

SOLUTION: Q7921

PROBLEM: 2, 5, ['C', 'e', 'a', 'n', 'Y', '4737']

SOLUTION:
Ynae