C2122121212121133131323331313113313233313231322331323223313111211   >>    C212212121212113313132333131311331323331323132233132322331311121   <<    C2122121212121133131323331313113313233313231322331323223313111213   >>      C2122121212121133131323331313113313233313231322331323223313111212   >>