C1111233133313231133133313331333133311221123121111113313233113231   >>    C111123313331323113313331333133313331122112312111111331323311323   <<    C1111233133313231133133313331333133311221123121111113313233113233   >>      C1111233133313231133133313331333133311221123121111113313233113232   >>