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: 2, 6, ['415', '3603', 'l', 'C', '9471', 'z', '4087', 'Y', 's']

SOLUTION: z1749Cl3063

PROBLEM: 2, 2, ['a', 'J']

SOLUTION: J

PROBLEM: 2, 5, ['C', 'O', 'L', '4019', 'm', '2823', 'R', 'L', 'W', '411']

SOLUTION:
m9104LO