D13133313221323331323331313113313233313231322331323331313132322121   >>    D1313331322132333132333131311331323331323132233132333131313232212   <<    D13133313221323331323331313113313233313231322331323331313132322123   >>      D13133313221323331323331313113313233313231322331323331313132322122   >>