idnr: 524

			2

		5
			3

		4

Difficulty: Easy (0)

idnr: 760


			4
6					1
3					4
		4

Difficulty: Very easy (0)

idnr: 5693

	4		1
			3


		1
		3		2

Difficulty: Very easy (0)

idnr: 3397

		4	6
					4


5
		1	3

Difficulty: Very easy (0)