(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?BeginnerExercise29/Solution]AP[GoWiki:2009]
DT[2009-07-14]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise29/Solution

Solution]
PL[B]

AB[ca][cb][db][eb][fc][dd][ed][fd][ae][be][ce][de]
AW[aa][ba][bb][fb][gb][bc][cc][dc][ec][gc][ad][bd][cd][gd][ge][ef][bg][dg]

;B[ab]C[B7]MN[7]

;
)
