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: 4, 5, ['S', 'S', 'L', '7199', '3259', '8515', '8657', '8201', 'V']

SOLUTION: 95239917

PROBLEM: 21, 28, ['8641', 'o', '1301', '8225', '8079', 'Y', 'O', '9571', 'n', 'Q', 'n', 'W', '6555', 'm', 'A', 'A', '4459', '5983', '5469', 'd', '6269', 'E', '2107', 'X', '8397', 'f', 'D', '9129']

SOLUTION: 9219Df7938X7012E9626

PROBLEM: 3, 6, ['927', '4459', '3709', 'b', '6479', 'D', '8949', 'd', '1697', 'v', 'b', 'L', '6349', '7655', 'N', 'v', 'E', '8351']

SOLUTION:
D9746b9073