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, 18, ['4729', '2591', '5309', 'L', 'F', '4977', 'I', 'E', '189', 'g', 'T', '3251', 'O', 'Z', '511', 'd', 'L', 'w']

SOLUTION: wLd115ZO1523Tg981EI7794FL903519529274

PROBLEM: 1, 1, ['341', '939']

SOLUTION: 143

PROBLEM: 12, 12, ['P', '8223', '8111', 'w', 'E', '5729', '6439', 'C', 'j', '3501', '3207', '1331', 'T', 'i', 'W', 'i', '5349', '3563', '1041', 'A', '429']

SOLUTION:
1331