C111123313331323113313331333133313331122112312111133133313223322121   >>    C11112331333132311331333133313331333112211231211113313331322332212   <<    C111123313331323113313331333133313331122112312111133133313223322123   >>      C111123313331323113313331333133313331122112312111133133313223322122   >>