student id	hw1-1	hw1-2	hw1-3	hw2-1	hw2-2
2003-21698	A	90	100	45	45
2003-23586	C	50	80	50	45
2004-21529	B	70	90	50	45
2004-21571	B	70	90	40	40
2004-21603	B	70	80	50	45
2004-21638	B	90	90	45	45
2005-21355	C	70	70	50	40
2005-21366	B	70	80	50	45
2005-21371	A	100	100	40	35
2005-21420	B	40	90	40	40
2005-21473	B	70	70	50	40
2005-21517	C	0	70	50	50
2005-21533	B	85	90
2005-23500	A	70	90	50	45
2005-24051	B	100	90	50	50
2006-21157	A	65	90	50	50
2006-21181	A	85	90	50	45
2006-21195	B	100	90	40	45
2006-21216	B	30	0	45	40
2006-21248	B	70	100	45	45
2006-21272	A	70	90	50	50
2006-21286	B	0	80	40	35