0: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19}
1: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
1: {10, 11, 12, 13, 14, 15, 16, 17, 18, 19}
2: {0, 2, 3, 4, 5, 6, 7, 8, 9}
2: {10, 11, 12, 13, 14, 15, 16, 17, 18}
2: {19} (leaf)
2: {1} (leaf)
3: {0, 3, 4, 5, 6, 7, 8, 9}
3: {10, 12, 13, 14, 15, 16, 17, 18}
3: {11} (leaf)
3: {2} (leaf)
4: {0, 4, 5, 6, 7, 8, 9}
4: {10, 13, 14, 15, 16, 17, 18}
4: {12} (leaf)
4: {3} (leaf)
5: {0, 5, 6, 7, 8, 9}
5: {10, 14, 15, 16, 17, 18}
5: {13} (leaf)
5: {4} (leaf)
6: {0, 6, 7, 8, 9}
6: {10, 15, 16, 17, 18}
6: {14} (leaf)
6: {5} (leaf)
7: {0, 7, 8, 9}
7: {10, 16, 17, 18}
7: {15} (leaf)
7: {6} (leaf)
8: {0, 8, 9}
8: {10, 17, 18}
8: {16} (leaf)
8: {7} (leaf)
9: {0, 9}
9: {10, 18}
9: {17} (leaf)
9: {8} (leaf)
10: {0} (leaf)
10: {10} (leaf)
10: {18} (leaf)
10: {9} (leaf)