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, 4, ['I', '5919', 'J', '6387']

SOLUTION: 7836J9195I

PROBLEM: 2, 11, ['N', '5989', '9485', '1955', '4841', '8403', 'f', 'M', '3261', '9581', '8083', '5201', '6391', 'h', 'C', 'O', '6361', '4033', '9121', '9825']

SOLUTION: 380818591623Mf30481484559158499895

PROBLEM: 9, 13, ['R', 'g', 'Z', 'w', '6371', 'w', '285', 'Y', '7209', 'f', '213', 'N', '7303', 'E']

SOLUTION:
3037N312f9027