idnr: 2745


2	3
			2
		3

Difficulty: Super easy (0)

idnr: 2517

	2		3
1		4

Difficulty: Super easy (0)

idnr: 620

3


			4

Difficulty: Super easy (0)

idnr: 1237

		4
			3
2
	1

Difficulty: Super easy (0)