D13133313221323331323331313113313233313231322331323132313221211   >>    D1313331322132333132333131311331323331323132233132313231322121   <<    D13133313221323331323331313113313233313231322331323132313221213   >>      D13133313221323331323331313113313233313231322331323132313221212   >>