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: 3, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']

SOLUTION: os

PROBLEM: 4, 13, ['6993', '5601', 'n', 'J', 'E', 'M', 'd', 'T', 'V', 'C', '4969', 'J', 'F']

SOLUTION: FJ9694CVTdMEJ

PROBLEM: 8, 13, ['I', '989', 'V', 'H', 'F', 'v', '1059', 'c', '2161', 'E', '7819', 'S', 'F', '4707', 'W']

SOLUTION:
FS9187E1612c