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: 1, 2, ['R', 'a']

SOLUTION: aR

PROBLEM: 1, 2, ['o', 'b', '7511', 'Z']

SOLUTION: bo

PROBLEM: 13, 21, ['5931', '4115', '559', 'U', 'x', '8237', 'e', 'm', 'o', 'l', 'D', '1893', '281', 'T', 'H', 'b', 'g', 'E', 'u', '9765', 'g', 'n', '9821', '9825', 'L', '6247', 'e']

SOLUTION:
g9765uEgbHT281