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: 16, 20, ['6923', '8559', 'Z', 'L', 'h', '8985', '6845', 'M', 'c', 'p', '9313', 'b', 'g', 'j', '7633', 'B', '2781', '6321', 'u', 'N', '7147', 'C', '2171', '1777', 'O', 'c', '2249', '9017', 'g']

B27816321uN