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: 18, 22, ['I', 'F', 'Y', 'Q', 'C', '333', '6051', '7461', 'm', '311', '3835', '8833', '8925', 's', 'o', '4279', 'r', 'N', 'x', '2923', 'Z', '9297', '2883', 'z']

SOLUTION: 7929Z3292xN

PROBLEM: 7, 14, ['j', '2199', '6995', 't', 'U', 'C', '1589', '7061', '851', 'N', '7923', '7387', '2053', 'L', 'y', '3685', 'X', 'C', '4679', '3691', '2991', 'f']

SOLUTION: L350278373297N15816079851

PROBLEM: 2, 2, ['H', 'O']

SOLUTION:
O