C22121333132313311211113313331333132233131133133313231323221211   >>    C2212133313231331121111331333133313223313113313331323132322121   <<    C22121333132313311211113313331333132233131133133313231323221213   >>      C22121333132313311211113313331333132233131133133313231323221212   >>