C21321133133313121211113313331323133313231333132233132312312231   >>    C2132113313331312121111331333132313331323133313223313231231223   <<    C21321133133313121211113313331323133313231333132233132312312233   >>      C21321133133313121211113313331323133313231333132233132312312232   >>