D3313131122211211331323221123313232233133313232121213231323132322221   >>    D331313112221121133132322112331323223313331323212121323132313232222   <<    D3313131122211211331323221123313232233133313232121213231323132322223   >>      D3313131122211211331323221123313232233133313232121213231323132322222   >>