3
##start
start 0 0
##end
end 1 1
long0 2 2
long1 3 3
short 4 4
longer0 5 5
longer1 6 6
longer2 7 7
start-long0
long0-long1
long1-end
start-short
short-end
start-longer0
longer0-longer1
longer1-longer2
longer2-end