digraph SCC {
 size="3,4"
 ratio="fill"
 edge[style="bold"]
 "www.boost.org"
 "www.yahoogroups.com"
 "weather.yahoo.com"
 "nytimes.com"
 "www.boston.com"
 "sourceforge.net"
 "www.hp.com"
 "anubis.dkuug.dk"
 "www.lsc.nd.edu"
 "www.lam-mpi.org"

 "www.boost.org" -> "www.yahoogroups.com"
 "www.boost.org" -> "sourceforge.net"
 "www.boost.org" -> "anubis.dkuug.dk"
 "www.yahoogroups.com" -> "weather.yahoo.com" 
 "www.yahoogroups.com" -> "www.boost.org"
 "weather.yahoo.com" -> "nytimes.com" 
 "weather.yahoo.com" -> "www.yahoogroups.com"
 "nytimes.com" -> "www.boston.com"
 "www.boston.com" -> "nytimes.com"
 "sourceforge.net" -> "www.hp.com"
 "www.hp.com" -> "sourceforge.net"
 "www.hp.com" -> "nytimes.com"
 "anubis.dkuug.dk" -> "www.lsc.nd.edu"
 "www.lsc.nd.edu" -> "anubis.dkuug.dk"
 "www.lsc.nd.edu" -> "www.lam-mpi.org"
 "www.lsc.nd.edu" -> "www.boston.com"
 "www.lsc.nd.edu" -> "weather.yahoo.com"
}