x=1,y=10.10000000,z=11.10000000,a=farewell world,b=hello world,c=hello world
x=2,y=10.20000000,z=12.20000000,a=farewell world,b=hello world,c=hello world
x=3,y=10.30000000,z=13.30000000,a=farewell world,b=hello world,c=hello world
