D112221121133131333132322112331323331311221123223313133313231333132333132211321   >>    D11222112113313133313232211233132333131122112322331313331323133313233313221132   <<    D112221121133131333132322112331323331311221123223313133313231333132333132211323   >>      D112221121133131333132322112331323331311221123223313133313231333132333132211322   >>