D12121212121313232233132332313233313132313331313232113313231232211   >>    D1212121212131323223313233231323331313231333131323211331323123221   <<    D12121212121313232233132332313233313132313331313232113313231232213   >>      D12121212121313232233132332313233313132313331313232113313231232212   >>