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: 14, 24, ['7539', '1653', '1415', '4545', '1969', '2893', 'W', '6317', 'v', '9095', '6265', 'X', '4399', '245', 'f', '8721', 'A', 'b', '7885', '8541', '8251', 'L', 'G', '6781']

SOLUTION: 6781GL825185417885bA8721f245

PROBLEM: 1, 4, ['z', 'Y', '157', 'c']

SOLUTION: c157Yz

PROBLEM: 1, 8, ['7869', 'M', 'J', 'x', 'H', 'j', '9405', 's']

SOLUTION:
s9405jHxJM7869