idnr: 3826
       
1   4  
  2   4
       
Difficulty: Super easy (0)
idnr: 4293
3      
    1  
  2    
      3
Difficulty: Very easy (0)
idnr: 6406
1      
  3    
    4  
      1
Difficulty: Very easy (0)
idnr: 2290
       
4 2    
    2 3
       
Difficulty: Super easy (0)