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: 7, 8, ['8275', 'o', 'f', '6403', '7399', 'M', 'E', '7879', 'e', 'L', 'F', '2019']

SOLUTION: 9787E

PROBLEM: 4, 5, ['1803', 'T', 'u', '1089', '5655']

SOLUTION: 55659801

PROBLEM: 6, 28, ['9623', '8795', 'c', 'T', 'b', 'y', 'i', 'p', '2949', '4937', 'F', '9555', 's', '5731', 'C', '6205', '6045', 'a', '4579', '8703', 'e', '6437', '229', 'I', '5523', '2471', 'b', 'O', 'r']

SOLUTION:
Ob17423255I9227346e30789754a54065026C1375s5559F73949492piy