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, ['2419', '643', '8177', '7291', '561', '6529', '4101', 'u', '6445']

SOLUTION: 19277718

PROBLEM: 7, 8, ['1601', 'M', '4289', 'n', 'r', '8973', 'F', 'Y', 'v', '3357']

SOLUTION: YF

PROBLEM: 4, 8, ['V', '8665', '3663', '9217', '8973', '2519', 'z', '751', 'I', '5973', 'O', 'S']

SOLUTION:
157z915237987129