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: 2, 19, ['121', 'G', 't', 'C', 'R', '5561', 'b', 'H', 'b', '8531', 'a', '9803', 'R', 's', '8487', '5815', 'a', '6827', 'o', 'E', '6399', '5509', '3827']

GtCR5561bHb8531a9803Rs84875815a6827o