C2122121212121133132213231313231333132233131323132313231323221121   >>    C212212121212113313221323131323133313223313132313231323132322112   <<    C2122121212121133132213231313231333132233131323132313231323221123   >>      C2122121212121133132213231313231333132233131323132313231323221122   >>