<replaceable>Y</replaceable> are the major and minor release numbers, and
<replaceable>Z</replaceable> is a counter starting at <literal>1</literal>.
When the release number is not yet known (often the case for
-<literal>testing</literal>, at the beginning of release cycles), the lower
+<literal>testing</literal>, at the beginning of release cycles), the lowest
release number higher than the last stable release number must be used. For
example, while Etch (Debian 4.0) is stable, a security NMU to stable for a
package at version <literal>1.5-3</literal> would have version