medium	00
medium	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
hard	1D
hard	1E
hard	1F
hard	20
hard	21
hard	22
hard	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
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
challenging	7E
challenging	7F
challenging	80
challenging	81
challenging	82
challenging	83
challenging	84
challenging	85
challenging	86
challenging	87
challenging	88
challenging	89
challenging	8A
challenging	8B
challenging	8C
challenging	8D