D1122211211331313331323221123313233313112211232233131333132313231323223311111   >>    D112221121133131333132322112331323331311221123223313133313231323132322331111   <<    D1122211211331313331323221123313233313112211232233131333132313231323223311113   >>      D1122211211331313331323221123313233313112211232233131333132313231323223311112   >>