? alpha
-0.4716
? x 1:21 1:4
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 1  
1 1 1 0  
0 1 1 0  
1 1 1 0  
1 1 1 0  
0 0 1 0  
1 0 0 1  
0 0 0 0  
0 0 0 0  
0 0 0 0  
0 0 0 0  
0 0 0 0  
0 0 0 0  
0 0 0 0