C1111233131211111211113313331333133313232212111133132233212213121   >>    C111123313121111121111331333133313331323221211113313223321221312   <<    C1111233131211111211113313331333133313232212111133132233212213123   >>      C1111233131211111211113313331333133313232212111133132233212213122   >>