Design and Copyright : Stephan Baumegger (2016).
AA.A....A|AA......A|AA.....AA AAAAAAAAA|AA.....AA|AAA....AA A.AAAAA.A|A.......A|A.A.....A
B......BB|B......BB|B......BB BBBBBBBBB|B......BB|B.....BBB B.B...B.B|B.......B|B.......B
C......CC|C......CC|CC.....CC CCCCCCCCC|C.......C|C......CC C.C.....C|C.......C|C.......C
D.......D|D.......D|D.......D DDDDDDDDD|DD......D|DDD.....D D.D...D.D|D.......D|D.......D