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: 16, 26, ['d', 'o', '8115', '7489', 'n', '9243', '5821', '5381', '5059', 'V', 'T', '6557', '2885', '721', '3867', '5941', '7613', '2933', '253', 'l', '7339', '3743', 'U', '7921', 'Q', '2077']

SOLUTION: 7702Q1297U34739337l352339231671495

PROBLEM: 6, 19, ['5701', '5045', '6443', 'N', 'm', '3577', 'B', 'X', 'F', '7309', '3013', 'q', '8183', 'S', '3781', 'g', 'r', 'Z', '8147', 'M', '5275', '851', '7985', '5247', 'J', '5427']

SOLUTION: 7418Zrg1873S3818q31039037FXB7753

PROBLEM: 3, 18, ['1509', 'Z', '511', '11', '1273', 'D', 'O', 'o', 'l', 'X', 'f', 'o', 'K', '6585', '7483', 'H', '3245', 'i', 'O', '2921', '8985', '7177', 'e', 'I', 'E', 'A', 'W', '2809']

SOLUTION:
i5423H38475856KofXloOD372111115