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: 6, 16, ['W', '143', '147', '2749', '9055', 'P', '6781', '3705', 'Y', '3033', '3537', 'G', 'u', '9927', '2717', '17', '3581', 'B', 'L']

P67813705Y30333537Gu9927271717