{5: 1, 8: 1}
{5: 2, 8: 2, 2: 2, 19: 1}
{5: 2, 8: 2, 2: 2, 19: 2, 18: 3, 20: 1}
17 18
{5: 2, 8: 2, 2: 2, 19: 2, 18: 3, 20: 1, 10: 3, 17: 3}
{5: 3, 8: 2, 2: 3, 19: 2, 18: 3, 20: 1, 10: 3, 17: 3}
3