intermediate	00
intermediate	01
intermediate	02
intermediate	03
intermediate	04
intermediate	05
intermediate	06
intermediate	07
intermediate	08
intermediate	09
intermediate	0A
intermediate	0B
intermediate	0C
intermediate	0D
intermediate	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
medium	36
medium	37
medium	38
medium	39
medium	3A
medium	3B
medium	3C
medium	3D
medium	3E
medium	3F
medium	40
medium	41
medium	42
medium	43
medium	44
medium	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
hard	7A
hard	7B
hard	7C
hard	7D
hard	7E
hard	7F
hard	80
hard	81
challenging	82
challenging	83
challenging	84
challenging	85
challenging	86
challenging	87
challenging	88
challenging	89
challenging	8A
challenging	8B