D1121323223313223313112132313231323123231323223313233313331323221213131   >>    D112132322331322331311213231323132312323132322331323331333132322121313   <<    D1121323223313223313112132313231323123231323223313233313331323221213133   >>      D1121323223313223313112132313231323123231323223313233313331323221213132   >>