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: 9, 18, ['K', 'z', 'N', 'M', 'C', '4085', 'Y', 'T', 'J', 'T', 'B', '1671', '1083', '2961', 'T', 'b', '5905', 'U', '6817', 'K', '9291', 'O']

SOLUTION: U5905bT296110831671BTJ

PROBLEM: 12, 17, ['2529', 'U', 'd', '9709', 'm', '2735', '5283', 'c', 'Q', 'E', '5785', '5913', 'k', 'K', 'i', 'V', '6369', '7167', 'B', '263', 'D', '8379', 'P', 'C', '4795', 'n', '1993', '1587', '6929', '4739']

SOLUTION: 6369ViKk5913

PROBLEM: 1, 1, ['2107', 't', 'I', 'Q', 'j', '7989', '2989', 'P', 'x', 'z', 'm', '361', '7711']

SOLUTION:
2107