C21321133133313121211113313331323133313231333132233132322311221   >>    C2132113313331312121111331333132313331323133313223313232231122   <<    C21321133133313121211113313331323133313231333132233132322311223   >>      C21321133133313121211113313331323133313231333132233132322311222   >>