$A\to DA\backslash rightarrow\; D$: $D(0+1\mathrm{\mid }0+3)D(0+\backslash textcolor\{ff6600\}\{1\}|0+\backslash textcolor\{ff6600\}\{3\})$

$B\to CB\backslash rightarrow\; C$: $C(4+1\mathrm{\mid }-3+3)C(4+\backslash textcolor\{ff6600\}\{1\}|-3+\backslash textcolor\{ff6600\}\{3\})$

Die Koordinaten des Eckpunktes $CC$ sind $C(5\mathrm{\mid }0)C(5|0)$.