intermediate 00
intermediate 01
intermediate 02
intermediate 03
intermediate 04
intermediate 05
intermediate 06
intermediate 07
intermediate 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
medium 24
medium 25
medium 26
medium 27
medium 28
medium 29
medium 2A
medium 2B
medium 2C
medium 2D
medium 2E
medium 2F
medium 30
medium 31
medium 32
medium 33
medium 34
medium 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
hard 6A
hard 6B
hard 6C
hard 6D
hard 6E
hard 6F
hard 70
hard 71
hard 72
hard 73
hard 74
hard 75
hard 76
hard 77
hard 78
hard 79
challenging 7A
challenging 7B
challenging 7C
challenging 7D
challenging 7E
challenging 7F
challenging 80
challenging 81
challenging 82
challenging 83
challenging 84
challenging 85
challenging 86