C22121333132313311211113313331333133313331333132313231322323211   >>    C2212133313231331121111331333133313331333133313231323132232321   <<    C22121333132313311211113313331333133313331333132313231322323213   >>      C22121333132313311211113313331333133313331333132313231322323212   >>