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: 16, 23, ['8677', '5311', '9815', 'v', 'x', 'q', 'F', '5221', '7309', '5201', '6021', 'w', 'e', 'q', '7021', '8889', '4377', 'w', '2731', '5969', 'J', '1001', '637', 'r', 'b', '409', 'l', '391']

SOLUTION: 7361001J96951372w77349888

PROBLEM: 8, 13, ['5437', '9055', 'j', '3087', '4775', 'a', 'Z', '5153', 'w', 'j', 'W', 'x', 'e', '5617', '9221', '2469', 'C', 'j', '2781', 'Z', '3005', '8983', '7937', '4671', '9745', '5467']

SOLUTION: exWjw3515

PROBLEM: 7, 8, ['A', 'f', 'E', '2239', 'Z', 'U', 'H', '745', '2345', 'k', '5969']

SOLUTION:
547H