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, 5, ['d', 'p', 'B', 'i', '5865', '4569']

SOLUTION: 5685iBpd

PROBLEM: 2, 3, ['2661', 'T', '8855', 'I', 'f', 'P']

SOLUTION: 5588T

PROBLEM: 14, 21, ['5907', '1979', 'j', 'C', 'Q', 'P', 'G', '2027', '5295', 'b', 'B', '3877', 'A', '8735', 'f', '8725', 'H', '1745', 'M', '7035', '5731']

SOLUTION:
13755307M5471H5278f5378