C211111133131323223313233313231133132333133313231323211331323221121   >>    C21111113313132322331323331323113313233313331323132321133132322112   <<    C211111133131323223313233313231133132333133313231323211331323221123   >>      C211111133131323223313233313231133132333133313231323211331323221122   >>