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, 22, ['5347', 'e', 'a', 'i', 'o', 'W', '3101', '5381', 'u', '8799', 'r', '7559', '9931', 'V', 'l', 'v', 's', 'q', 'C', 'o', '7803', 'c']

SOLUTION: c3087oCqsvlV13999557r9978u18351013Woia

PROBLEM: 1, 4, ['I', '5919', 'J', '6387']

SOLUTION: 7836J9195I

PROBLEM: 12, 23, ['Q', '1233', '1811', '9649', '3799', '7727', 'H', 's', '2057', 'O', 'T', 'e', 's', '755', '5809', '235', 'M', '4769', 'O', 'B', '6797', '811', '315', '105', 'O', '4371', '5577', 'Y', '6931', '9613']

SOLUTION:
5131187976BO9674M5329085557se