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: 2, 7, ['j', '7173', 'D', '6745', '9469', '3259', '5885', '9507', 'U', '8735', 'C', 'O', '2055', 'm', '2265', '9445', '6445']

SOLUTION: 5885325994696745D7173

PROBLEM: 12, 16, ['t', '4893', 'N', 'U', 'E', 'U', 'D', 's', '9541', '651', 'm', '2875', 'c', '6059', '4397', '1263']

SOLUTION: 126343976059c2875

PROBLEM: 18, 19, ['m', '371', '4111', '8217', 'A', 'Y', 'T', 'u', 'g', '5469', '6859', '1159', '9803', '3195', 'Q', '5475', 'O', '1865', 'R', '6629']

SOLUTION:
R1865