TASK DEFINITION: In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
PROBLEM: 8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']

SOLUTION: vb

PROBLEM: 2, 9, ['7175', '1487', '4759', '8719', 'f', '9899', '1987', 'h', 'o', '5495', '3665', 'k', 'j', 'C', 'H', 'V', '9443', '1203', 'j', 'p']

SOLUTION: oh78919989f917895747841

PROBLEM: 6, 11, ['4319', 's', 'R', '5551', 'G', 'b', '8469', 'X', 'O', '729', 'R', '5711', 'I', '1005', '9915', '9893', 'u', 'T', 'N', '2415']

SOLUTION:
R927OX9648b