C1111233133313231133133313331333133311221123121111331333131121212321   >>    C111123313331323113313331333133313331122112312111133133313112121232   <<    C1111233133313231133133313331333133311221123121111331333131121212323   >>      C1111233133313231133133313331333133311221123121111331333131121212322   >>