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, 20, ['v', '5967', '7141', 'a', 'S', '5557', 'D', '8657', 'R', '4463', '8475', '3361', '9101', '6715', '945', 'Y', '6207', '7685', 'w', 'Z', '5987', '4215']

59677141aS5557D8657R44638475336191016715945Y62077685wZ