C22121333132313311211113313331333133313121111331333132233132322121   >>    C2212133313231331121111331333133313331312111133133313223313232212   <<    C22121333132313311211113313331333133313121111331333132233132322123   >>      C22121333132313311211113313331333133313121111331333132233132322122   >>