D1122211211331313331323221123313233313112211232233131333132313232211   >>    D112221121133131333132322112331323331311221123223313133313231323221   <<    D1122211211331313331323221123313233313112211232233131333132313232213   >>      D1122211211331313331323221123313233313112211232233131333132313232212   >>