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: 4, 5, ['3349', '9445', '703', 'k', '3191', '4473', 'K', '3417', '8305', '8781', 'K', 'v', 'O', 'Y', '4375', 'o']

SOLUTION: 1913k

PROBLEM: 10, 11, ['i', 'w', 'V', '2695', 'I', 'q', 'o', 'X', 'u', 's', 'e', 'f', '7693', 'q', '5845', 'e', '4161', '3059', 'F', '6863', '985', 'D', '3643', '383', 'A', '7515', '4335']

SOLUTION: es

PROBLEM: 18, 25, ['5345', 'l', '7819', '5973', '2595', 'z', '6299', 'x', 'v', 'Y', '8801', 'X', '2689', 'h', 'f', '6565', 'L', '7769', '4511', '9691', '2149', 'J', '6099', '8053', '8023']

SOLUTION:
320835089906J9412196911549677