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

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