COW PERIOD DIET YIELD
1  1    1  38  
2  1    2 109  
3  1    3 124     
4  1    1  86 
5  1    2  75  
6  1    3 101
1  2    2  25  
2  2    3  86
3  2    1  72    
4  2    3  76
5  2    1  35
6  2    2  63
1  3    3  15
2  3    1  39
3  3    2  27   
4  3    2  46
5  3    3  34
6  3    1   1