C21321133133313121211113313331323133313231333133313123232233121   >>    C2132113313331312121111331333132313331323133313331312323223312   <<    C21321133133313121211113313331323133313231333133313123232233123   >>      C21321133133313121211113313331323133313231333133313123232233122   >>