{9: 1, 19: 1}
{9: 2, 19: 1, 4: 2}
10 19
{9: 3, 19: 1, 4: 3, 1: 2, 10: 3}
{9: 4, 19: 2, 4: 3, 1: 2, 10: 4}
11 19
{9: 5, 19: 2, 4: 3, 1: 2, 10: 5, 7: 4, 11: 5}
5