(;GM[1]FF[4]SZ[19]
GN[Total security]
PC[http://senseis.xmp.net/?ContinuumOfSecurity]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ContinuumOfSecurity

Total security]
PL[B]

AB[ba][da][ab][bb][cb][db]


;
)
