C21321133133313121211113313331323133313231333132233132323132211   >>    C2132113313331312121111331333132313331323133313223313232313221   <<    C21321133133313121211113313331323133313231333132233132323132213   >>      C21321133133313121211113313331323133313231333132233132323132212   >>