www.A.com	www.B.com
www.A.com	www.C.com
www.A.com	www.D.com
www.A.com	www.E.com
www.B.com	www.D.com
www.B.com	www.E.com
www.C.com	www.D.com
www.D.com	www.B.com
www.E.com	www.A.com
www.F.com	www.B.com
www.F.com	www.C.com
