{5: 1, 20: 1}
19 20
{5: 2, 20: 1, 3: 2, 19: 2}
{5: 2, 20: 2, 3: 2, 19: 3, 11: 3}
{5: 3, 20: 2, 3: 2, 19: 3, 11: 3, 4: 3}
{5: 4, 20: 3, 3: 3, 19: 4, 11: 4, 4: 4, 1: 3}
18 19
{5: 4, 20: 3, 3: 3, 19: 4, 11: 4, 4: 4, 1: 3, 14: 5, 18: 5}
15 18
{5: 4, 20: 3, 3: 3, 19: 4, 11: 5, 4: 4, 1: 3, 14: 6, 18: 5, 6: 5, 15: 6}
{5: 4, 20: 3, 3: 3, 19: 5, 11: 5, 4: 4, 1: 3, 14: 7, 18: 6, 6: 5, 15: 7, 13: 6}
{5: 4, 20: 3, 3: 3, 19: 5, 11: 6, 4: 4, 1: 3, 14: 8, 18: 6, 6: 5, 15: 7, 13: 7, 9: 6}
{5: 4, 20: 3, 3: 3, 19: 5, 11: 6, 4: 4, 1: 3, 14: 8, 18: 6, 6: 5, 15: 7, 13: 8, 9: 6, 12: 7}
8