# Omega Calculator v1.2 (based on Omega Library 1.2, August, 2000):
# 
# reachable (a,b,c)
# 	  { a->b:{[1]->[2]},
# 	     b->c:{[2]->[3]},
# 	     a:{[1]}};
Node b: {[2]}
Node c: {[3]}
#