00:difficulty: easy
01:difficulty: easy
02:difficulty: easy
03:difficulty: easy
04:difficulty: easy
05:difficulty: easy
06:difficulty: easy
07:difficulty: intermediate
08:difficulty: intermediate
09:difficulty: intermediate
0A:difficulty: intermediate
0B:difficulty: intermediate
0C:difficulty: intermediate
0D:difficulty: intermediate
0E:difficulty: intermediate
0F:difficulty: intermediate
10:difficulty: intermediate
11:difficulty: intermediate
12:difficulty: intermediate
13:difficulty: intermediate
14:difficulty: intermediate
15:difficulty: intermediate
16:difficulty: intermediate
17:difficulty: intermediate
18:difficulty: intermediate
19:difficulty: intermediate
1A:difficulty: intermediate
1B:difficulty: intermediate
1C:difficulty: intermediate
1D:difficulty: intermediate
1E:difficulty: intermediate
1F:difficulty: intermediate
20:difficulty: intermediate
21:difficulty: intermediate
22:difficulty: intermediate
23:difficulty: intermediate
24:difficulty: intermediate
25:difficulty: intermediate
26:difficulty: intermediate
27:difficulty: intermediate
28:difficulty: medium
29:difficulty: medium
2A:difficulty: medium
2B:difficulty: medium
2C:difficulty: medium
2D:difficulty: medium
2E:difficulty: medium
2F:difficulty: medium
30:difficulty: medium
31:difficulty: medium
32:difficulty: medium
33:difficulty: medium
34:difficulty: medium
35:difficulty: medium
36:difficulty: medium
37:difficulty: medium
38:difficulty: medium
39:difficulty: medium
3A:difficulty: medium
3B:difficulty: medium
3C:difficulty: medium
3D:difficulty: medium
3E:difficulty: medium
3F:difficulty: medium
40:difficulty: medium
41:difficulty: medium
42:difficulty: medium
43:difficulty: medium
44:difficulty: medium
45:difficulty: medium
46:difficulty: medium
47:difficulty: medium
48:difficulty: medium
49:difficulty: medium
4A:difficulty: medium
4B:difficulty: medium
4C:difficulty: medium
4D:difficulty: medium
4E:difficulty: medium
4F:difficulty: medium
50:difficulty: medium
51:difficulty: medium
52:difficulty: hard
53:difficulty: hard
54:difficulty: hard