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: 13, 13, ['1771', 'u', 'w', 'k', 'P', '7297', 'Y', '2223', 'X', 'u', '3067', '19', 'w', 'A', 'b', '4309', 'O', '7215', 'z', '6609', '4479', '3149', '6829', '8597', '4829']

SOLUTION: w

PROBLEM: 4, 7, ['3421', '6129', '593', '203', '2731', '1393', '9739', '1087', '3453', '1389', 'W', 'D', 'b', '9261']

SOLUTION: 937939311372302

PROBLEM: 5, 11, ['2225', '4639', 'D', '3165', '9101', 'V', '1611', '3477', '8973', 'F', 'W', 'Y', '2817', 't', '6363', '8629', '5531', '747', '3993', 'H']

SOLUTION:
WF379877431161V1019