time:0.38, 2 
time:0.98, 3 
time:1.5, 4 
time:2.02, 3 
time:2.54, 2 
time:3.02, 3 
time:3.52, 4 
time:4.02, 1 
time:4.52, 2 
time:5.02, 3 
time:5.52, 4 
time:6.02, 1 
time:6.52, 2 
time:7.02, 3 
time:7.52, 4 
--------------------------------