diff --git a/benchmarks/flex/lexer.l b/benchmarks/flex/lexer.l
index d4834402..dcddab43 100644
--- a/benchmarks/flex/lexer.l
+++ b/benchmarks/flex/lexer.l
@@ -9,16 +9,23 @@
 FILE *fp;
 %}
 
+/*Definition block*/
 DIGIT       [0-9]
 IDENTIFIER  [_a-zA-Z][_a-zA-Z0-9]*
 KEYWORD     "bool"|"int"|"str"|"else"|"range"|"for"|"import"|"def"|"or"|"not"|"True"|"False"|"float"|"if"|"elif"|"while"|"break"|"continue"|"return"|"and"|"in"|"None"
 OPERATOR    "%"|","|"-"|"=="|">"|"("|"."|"="|"*"|"!="|"<="|")"|"]"|"+"|"/"|"<"|">="|"["
-SPECIAL     ":"|"->"|"    "++|[\n]
+SPECIAL     ":"|"->"|"    "|[\n]
 QUOTE1      "\'"[^'\\]*"\'"
 QUOTE2      "\""[^"\\]*"\""
-%%
 
-{DIGIT}+ {
+/*Rules blok*/
+INTEGER     {DIGIT}+
+FLOAT       {DIGIT}+"."{DIGIT}*
+STRINGS     {QUOTE1}|{QUOTE2}
+
+/*States rections*/
+%%
+{INTEGER} {
     #ifdef PRINT
         printf( "An integer: %s (%d)\n", yytext, atoi( yytext ) );
     #endif
@@ -29,7 +36,7 @@ QUOTE2      "\""[^"\\]*"\""
     #endif
 }
 
-{DIGIT}+"."{DIGIT}* {
+{FLOAT} {
     #ifdef PRINT
         printf( "A float: %s (%g)\n", yytext, atof( yytext ) );
     #endif
@@ -73,7 +80,7 @@ QUOTE2      "\""[^"\\]*"\""
     #endif
 }
 
-{QUOTE1}|{QUOTE2} {
+{STRINGS} {
     #ifdef PRINT
         printf( "An string: %s\n", yytext );
     #endif
@@ -95,7 +102,7 @@ QUOTE2      "\""[^"\\]*"\""
     #endif
 }
 
-[ ]  printf( "Space: %s\n", yytext );
+[ ]               printf( "Space: %s\n", yytext );
 "{"[^}\n]*"}"     printf( "Unrecognized character: %s\n", yytext );/* eat up one-line comments */
 
 
@@ -104,6 +111,8 @@ QUOTE2      "\""[^"\\]*"\""
 
 %%
 
+/* User code*/
+
 main(int argc, char **argv)
 {
     ++argv, --argc;  /* skip over program name */