Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
Input: 3, 14, ['C', '999', 'O', 'o', '1021', '7945', '5437', '7237', 'w', '6535', '1853', '4091', 'A', 'B', '2071', 'o', '721', 'O', '7573', 'f', 'u', '3329', 'B', 'K']

Oo1021794554377237w653518534091AB