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: 8, 20, ['2963', '157', 'c', 'n', 'b', 'S', '4105', 'C', 'V', 'P', '2471', 'W', '3205', '5979', '9651', '3287', '3367', '7987', 'c', '975', 'L']

CVP2471W320559799651328733677987c975