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, 5, ['a', 'I', 'J', 'a', '9779', 'i', '7835', 'S', '5809']

SOLUTION: 9779a

PROBLEM: 5, 6, ['9891', '9721', 'q', 'u', '8721', 'l', 'm', 'p']

SOLUTION: l8721

PROBLEM: 6, 12, ['l', 'G', '53', '1639', '6153', 'X', '837', 'H', 'k', '4459', '959', 'b', '1617', 'W', '2461']

SOLUTION:
b9594459kH837X