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: 1, 12, ['6893', 'o', '2661', 'T', 'w', 'u', 'k', '7727', 'X', '9861', '9125', 'o', 'x', '9109']

SOLUTION: o52191689X7277kuwT1662o3986

PROBLEM: 1, 9, ['v', '289', 'O', 'w', 'y', 'r', 's', 'T', '659', 'y', 'a', '9161', 'Y', '5075', 'M', 'L', '5915']

SOLUTION: 956TsrywO982v

PROBLEM: 10, 21, ['7283', '8431', '2673', '8945', 'K', 'D', '4389', '7177', '9427', 't', 'H', 'w', 'L', 'R', 'Q', '4249', 'D', '883', 'o', 'X', 'a', '1795', 'C', 'G', 'k']

SOLUTION:
aXo388D9424QRLwHt