C22121333132313311211113313331333132233131133133313232213231221   >>    C2212133313231331121111331333133313223313113313331323221323122   <<    C22121333132313311211113313331333132233131133133313232213231223   >>      C22121333132313311211113313331333132233131133133313232213231222   >>