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, 13, ['6993', '5601', 'n', 'J', 'E', 'M', 'd', 'T', 'V', 'C', '4969', 'J', 'F']

SOLUTION: FJ9694CVTdMEJ

PROBLEM: 1, 1, ['341', '939']

SOLUTION: 143

PROBLEM: 4, 14, ['f', '8239', '2293', 'r', '9305', '9837', '5675', '8427', '1831', '1865', '2015', '9925', 'h', '7979', 'V', '2543', '739', 'X', '7609', 'J', '1335', 'Z', '579', 'a']

SOLUTION:
9797h52995102568113817248576573895039r