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diff --git a/examples/manual/replace.lex b/examples/manual/replace.lex
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+/*
+ * replace.lex : A simple filter for renaming
+ * parts of flex of bison generated
+ * scanners or parsers.
+ */
+
+%{
+#include <stdio.h>
+
+char lower_replace[1024];
+char upper_replace[1024];
+
+%}
+
+%%
+
+"yy" printf("%s",lower_replace);
+"YY" printf("%s",upper_replace);
+, ECHO;
+
+%%
+
+int main(int argc, char *argv[])
+{
+ if(argc < 2){
+ printf("Usage %s lower UPPER\n",argv[0]);
+ exit(1);
+ }
+ strcpy(lower_replace,argv[1]);
+ strcpy(upper_replace,argv[2]);
+ yylex();
+ return(0);
+}