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: 10, 10, ['6879', '7973', '9461', 'n', '6159', '2367', 'Q', 'M', '4221', 'F', '7315', 'Y', 'x', '445', 'b', 't', 'h', '9993', '4485', '2471', '5111']

SOLUTION: F

PROBLEM: 11, 20, ['T', 'U', '8683', 'N', 'X', 'F', '1307', 'Y', '1347', '6855', 'Y', '2007', '8981', '1943', 'F', '5463', '9905', 'L', '3509', '5787', 'b']

SOLUTION: 57873509L99055463F194389812007Y

PROBLEM: 5, 11, ['Z', '6631', 'd', 'V', 'Z', 'Z', 'h', '1987', 'z', '7313', '2741', '9797', 'u', '6085', '1533', '87', 'Z', '1111', '1995']

SOLUTION:
27417313z1987hZZ