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, ['4367', '4367', 'm', '5681', '931', '9039', '8313', '6335', 'w', 'd', 'V', '1741', '1703', 'I', 't', 'a', 'P', 'P', 'x']

SOLUTION: 53363138

PROBLEM: 1, 5, ['d', 'p', 'B', 'i', '5865', '4569']

SOLUTION: 5685iBpd

PROBLEM: 10, 20, ['s', 'U', 'c', '4771', 'x', 'T', '5151', '6401', '2307', 'l', '2657', 'r', 'z', 'u', 'K', 'v', '3255', 'q', 'K', '7501', 'p', '7623', 'U', 'c', '5837', '9357', 'N', 'l']

SOLUTION:
1057Kq5523vKuzr7562l