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, ['2861', '8639', '483', 'i', 'M', 'U', '6293', '5293', 'Q', 'y', '6117', '2335', 'g', 's', '4485', 's', 'o', 'P', 'O', '2745', '9817', '3335']

SOLUTION: Mi38493681682

PROBLEM: 4, 9, ['d', '1057', '5737', '6925', '6365', 'y', 'w', '6535', 'P', 'F']

SOLUTION: P5356wy56365296

PROBLEM: 9, 12, ['n', 'c', 'Q', 'Q', 'f', '6333', '3615', 'B', 'H', 'B', '2721', 'I', '8651', '9729', '7139']

SOLUTION:
I1272BH