time,gnt_0,gnt_1,gnt_2,gnt_3
8,x,x,x,x
24,0,0,0,0
40,0,0,0,0
56,1,0,0,0
72,0,1,0,0
88,0,1,0,0
104,0,0,1,0
120,0,0,1,0
136,0,0,0,1
152,0,0,0,0
