C1111233133313231133133313331333133311221123121111331333132211111   >>    C111123313331323113313331333133313331122112312111133133313221111   <<    C1111233133313231133133313331333133311221123121111331333132211113   >>      C1111233133313231133133313331333133311221123121111331333132211112   >>