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: 11, 15, ['4565', 'Q', 'C', '8503', 'n', 'B', 'r', '8589', 'h', 'v', 'B', '5755', 'h', '3595', '9739', 'X', 'n', '5393']

SOLUTION: 93795953h5575B

PROBLEM: 3, 23, ['6019', '53', '7031', '9247', 'Y', '8401', '7359', 'B', 'k', 'T', '7499', 'k', '5269', '4987', '8147', 'q', '3429', '1033', '9463', 'y', 'q', 'd', '6493', '4479', 'd', 'W', 'y']

SOLUTION:
3946dqy364933019243q741878949625k9947TkB95371048Y74291307