http://mit.edu/6.009/www/lab9_examples/here/yellowsub-verse1.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-chorus.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-verse2.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-chorus.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-verse3.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-chorus.txt -- http://mit.edu/6.009/www/lab9_examples/here/yellowsub-chorus.txt