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: 12, 13, ['w', '2825', '7553', '5565', '4973', '1763', '4755', 'c', 'y', '6241', '7527', '7701', '865']

SOLUTION: 5681077

PROBLEM: 3, 4, ['19', '2669', 'v', 'd', '2221', '4219', 'A', 'P', '7499', 'z', 'm', 'l', '427', 'u']

SOLUTION: dv

PROBLEM: 9, 23, ['Y', '291', '8855', 'r', '3901', '891', '5589', '7519', '5429', '2123', '1105', '5659', 't', 'O', '3155', '2507', 's', 'B', 'Z', '6333', 's', '3759', '1465']

SOLUTION:
56419573s3336ZBs70525513Ot9565501132129245