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, ['A', '8103', '7829']

SOLUTION: 3018A

PROBLEM: 1, 4, ['3633', 'k', '9685', 't']

SOLUTION: t5869k3363

PROBLEM: 6, 8, ['s', '8551', 'Y', '4989', 'P', '1799', 'p', 'W', 'O', 'l', 'G']

SOLUTION:
Wp9971