$ cat /var/tmp/cars/Honda/Civic 
Honda,Civic,Red,2008
Honda,Civic,Red,2003
Honda,Civic,Red,1992
Honda,Civic,Green,2008

$ cat /var/tmp/cars/Honda/Accord 
Honda,Accord,Red,1992
Honda,Accord,Black,1992

$ cat /var/tmp/cars/Ford/Focus 
Ford,Focus,Green,2009
Ford,Focus,Green,2007