idnr: 2186

	2
4			2
3			1
		3

Difficulty: Super easy (0)

idnr: 2316

4
	3	4
	2	3
			2

Difficulty: Super easy (0)

idnr: 1551

	4		2
1
			1
2		4

Difficulty: Super easy (0)

idnr: 2023

3			2
		1
	3
2			1

Difficulty: Super easy (0)