intermediate 00
intermediate 01
medium 02
medium 03
medium 04
medium 05
medium 06
medium 07
medium 08
medium 09
medium 0A
medium 0B
medium 0C
medium 0D
medium 0E
medium 0F
medium 10
medium 11
medium 12
medium 13
medium 14
medium 15
medium 16
medium 17
medium 18
medium 19
medium 1A
medium 1B
medium 1C
medium 1D
medium 1E
medium 1F
medium 20
medium 21
medium 22
medium 23
hard 24
hard 25
hard 26
hard 27
hard 28
hard 29
hard 2A
hard 2B
hard 2C
hard 2D
hard 2E
hard 2F
hard 30
hard 31
hard 32
hard 33
hard 34
hard 35
hard 36
hard 37
hard 38
hard 39
hard 3A
hard 3B
hard 3C
hard 3D
hard 3E
hard 3F
hard 40
hard 41
hard 42
hard 43
hard 44
hard 45
hard 46
hard 47
hard 48
hard 49
hard 4A
hard 4B
hard 4C
hard 4D
hard 4E
hard 4F
hard 50
hard 51
hard 52
hard 53
hard 54
hard 55
hard 56
hard 57
hard 58
hard 59
hard 5A
hard 5B
hard 5C
hard 5D
hard 5E
hard 5F
hard 60
hard 61
hard 62
hard 63
hard 64
hard 65
hard 66
hard 67
hard 68
hard 69
challenging 6A
challenging 6B
challenging 6C
challenging 6D
challenging 6E
challenging 6F
challenging 70
challenging 71
challenging 72
challenging 73
challenging 74
challenging 75
challenging 76
challenging 77
challenging 78
challenging 79
challenging 7A