idnr: 442


2		1
	3		4

Difficulty: Super easy (0)

idnr: 578

3
1
			4
			2

Difficulty: Super easy (0)

idnr: 267

4			1
	2
		1
2			3

Difficulty: Super easy (0)

idnr: 142

1			2
		4
	1
3			4

Difficulty: Super easy (0)