C111123313331323113313331333133313331122112312111133133313331333132233312321   >>    C11112331333132311331333133313331333112211231211113313331333133313223331232   <<    C111123313331323113313331333133313331122112312111133133313331333132233312323   >>      C111123313331323113313331333133313331122112312111133133313331333132233312322   >>