# sample 1

root	-> a0 | a1 | a2 | a3

# level 1
a0	-> b0 | b1 | b2 | b3 

# level 2
b3	-> c0 | c1 | c2 | c3 | c4

# level 3
c3	-> d0 | d1 | d2 | d3

# level 4
d3	-> e0 | e1

root	= circle "", 12

a0	= root
a1	= root
a2	= root
a3	= root

b0	= root
b1	= root
b2	= root
b3	= root

c0	= root
c1	= root
c2	= root
c3	= root
c4	= root

d0	= root
d1	= root
d2	= root
d3	= root

e0	= root
e1	= root

# eof