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, 2, ['5111', 'U', '441', '8381']

SOLUTION: U1115

PROBLEM: 7, 8, ['9287', 'V', 't', 'W', 'W', 'w', 'N', 'T', 'Y']

SOLUTION: TN

PROBLEM: 16, 17, ['t', '5201', '9861', 'A', 'l', '8235', '5135', 'I', 'B', 'J', 'n', '4303', '3501', '8091', '6359', 'T', '5005', '6815', 'v']

SOLUTION:
5005T