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: 15, 18, ['9099', '2041', '7065', '1323', '2267', '5877', 'r', 'j', '4411', 'u', 'V', '4919', '6401', '8449', 'X', 'H', 'z', 's', '2543', '4643']

SOLUTION: szHX

PROBLEM: 1, 3, ['u', 'D', '6391']

SOLUTION: 6391Du

PROBLEM: 4, 12, ['h', 'U', 'f', 'X', 'B', 'z', 'x', 'K', 'F', 'b', 'q', 'i', 'F', 'K', '4473']

SOLUTION:
iqbFKxzBX