idnr: 1159
    1  
2      
      2
  3    
Difficulty: Very easy (0)
idnr: 5518
       
2     3
3     4
       
Difficulty: Very easy (0)
idnr: 2842
  3   1
4   1  
  1   4
1   3  
Difficulty: Super easy (0)
idnr: 5586
3   4 2
      4
4      
2 4   3
Difficulty: Super easy (0)