D112221121133131333132322112331323331311221123223313133313231323221321   >>    D11222112113313133313232211233132333131122112322331313331323132322132   <<    D112221121133131333132322112331323331311221123223313133313231323221323   >>      D112221121133131333132322112331323331311221123223313133313231323221322   >>