idnr: 4253
      3
  4    
    4  
1      
Difficulty: Very easy (0)
idnr: 3631
    1  
  3   2
2   3  
  1    
Difficulty: Super easy (0)
idnr: 5396
  3    
4      
      1
    3  
Difficulty: Very easy (0)
idnr: 404
       
  3 2  
  2 4  
       
Difficulty: Very easy (0)