D231123132333132233131323223313231323132322113313233313231232211   >>    D23112313233313223313132322331323132313232211331323331323123221   <<    D231123132333132233131323223313231323132322113313233313231232213   >>      D231123132333132233131323223313231323132322113313233313231232212   >>