The reduced degree 4 case. 0: 0 1 2 3 0 1 2 3 1: 0 1 2 0 3 2 1 3 2: 0 1 2 0 3 1 2 3 3: 0 1 0 2 3 1 3 2 4: 0 1 0 2 3 1 2 3 5: 0 1 0 2 1 3 2 3 6: 0 1 0 1 2 3 2 3 Total number of equations considered was: 15. Total number of row operations performed was: 10. Maximal equation length is: 3. 0 1 2 3 4 5 6 0:-1 0 1 0 1 0 0 1: 0 1-1 1 0 0 0 2: 0 0 0 0 0 0 0 3: 0 0 0 1-1 1 0 4: 0 0 0 0-1 2-1 5: 0 0 0 0 0 0 0 6: 0 0 0 0 0 0 0 3 ; 0 : -1 , 2 : 1 , 4 : 1 , 3 ; 1 : 1 , 2 : -1 , 3 : 1 , 0 ; 3 ; 3 : 1 , 4 : -1 , 5 : 1 , 3 ; 4 : -1 , 5 : 2 , 6 : -1 , 0 ; 0 ; Total nunmber of diagrams is: 7. Number of degrees of freedom is: 3.