Case 1: 1 Case 2: 2 Case 3: 3 Case 4: 2 Case 5: 2 Case 6: 2 Case 7: 3 Case 8: 1 Case 9: 2 Case 10: 1 Case 11: 2 Case 12: 1 Case 13: 1 Case 14: 2 Case 15: 2 Case 16: 2 Case 17: 1 Case 18: 1 Case 19: 2 Case 20: 2