D13133313221323331323331313113313233313231322331323132322121311   >>    D1313331322132333132333131311331323331323132233132313232212131   <<    D13133313221323331323331313113313233313231322331323132322121313   >>      D13133313221323331323331313113313233313231322331323132322121312   >>