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: 2, 2, ['w', '5569', '6229', 'b']

SOLUTION: 9655

PROBLEM: 6, 7, ['8123', 'G', '4941', 'Z', 'i', 'T', '3335']

SOLUTION: 5333T

PROBLEM: 12, 14, ['9149', 'v', 'G', 'm', 'D', 'X', '377', '5331', '3505', 'w', '9975', '7513', '9721', 'W', '1553', 'c', '5403', '4231', 'n', '2187', 'K', 'K', 's', '6549', '1203', 'H']

SOLUTION:
W12793157