diff --git a/exe/mm2ep-depend b/exe/mm2ep-depend
index d59d18e..b2a5dab 100755
--- a/exe/mm2ep-depend
+++ b/exe/mm2ep-depend
@@ -7,6 +7,8 @@ require 'rly'
 require 'pry'
 require 'parser.rb'
 require 'lexer.rb'
+require 'lexer2.rb'
+require 'parser2.rb'
 
 module Mm2ep
   module Depend
@@ -16,9 +18,14 @@ module Mm2ep
       def parse(infile)
 
         File.open(infile).each_line do |line|
-          parser = Parser.new(Lexer.new)
-          token = parser.parse(line.chomp)
-          puts token
+          # parser = Parser.new(Lexer.new)
+          # puts line.inspect
+          # token = parser.parse(line.chomp, true)
+          # puts token
+          # binding.pry
+          parser = Parser2.new
+          lexer = TestLexer.new(parser.parse(line))
+          puts lexer.testlexe
         end
       end
     end
diff --git a/lib/lexer2.rb b/lib/lexer2.rb
new file mode 100644
index 0000000..502a390
--- /dev/null
+++ b/lib/lexer2.rb
@@ -0,0 +1,110 @@
+module Mm2ep
+  module Depend
+    class TestLexer
+      attr_reader :truc, :tokens, :fait, :non_traites, :i, :atteint
+
+      BOOL_EXPR = ['T_BOOL', 'F_BOOL'].freeze
+
+      EXPR = {
+        'EXPR_T1' => ['VAR'],
+        'EXPR_T2' => ['BOOL_EXPR'],
+        'EXPR_T3' => ['VAR', 'SPACE', 'EQ_OP', 'SPACE', 'NUMBER'],
+        'EXPR_T4' => ['VAR', 'SPACE', 'EQ_OP', 'SPACE', 'STRING'],
+        'EXPR_T5' => ['VAR', 'SPACE', 'EQ_OP', 'SPACE', 'T_BOOL'],
+        'EXPR_T6' => ['VAR', 'SPACE', 'EQ_OP', 'SPACE', 'F_BOOL'],
+        'EXPR_NT1' => ['EXPR', 'SPACE', 'OR_OP', 'SPACE', 'EXPR'],
+        'EXPR_NT2' => ['EXPR', 'SPACE', 'AND_OP', 'SPACE', 'EXPR'],
+        'EXPR_NT3' => ['L_PAR', 'SPACE', 'EXPR', 'SPACE', 'R_PAR'],
+        'EXPR_NT4' => ['NOT_OP', 'SPACE', 'EXPR']
+      }.freeze
+
+      def initialize tokens
+        @non_traites = []
+        @fait = false
+        @tokens= tokens
+        @i = 0
+        @atteint = false
+      end
+
+      def try_expr
+        @truc = Hash[@truc.sort_by { |key, value| value.length }.reverse!]
+        @truc.each do |_, value|
+          if @tokens[@i...@i+value.length].eql? value
+            @tokens.slice!(@i...@i+value.length)
+            @tokens.insert(@i, 'EXPR')
+            unless @non_traites.empty?
+              @i -= 2
+              @non_traites.pop(2)
+              @fait = true
+              break
+            end
+          end
+        end
+      end
+
+      def move_forward
+        @non_traites << @tokens[@i]
+        @non_traites << @tokens[@i+1]
+        @i += 2
+      end
+
+      def move_backwards
+        @i -= 2
+        @non_traites.pop(2)
+      end
+
+      def expr_nt
+        @fait = false
+        try_expr
+        # binding.pry
+        if !fait && @i < @tokens.size-1
+          if !@atteint || (!@tokens[@i].eql?('OR_OP') && !@tokens[@i].eql?('AND_OP'))
+            move_forward
+          else
+            move_backwards
+          end
+        elsif !fait
+          move_backwards
+        end
+      end
+
+      def expr
+        @truc = EXPR.select { |key, value| value.include? @tokens[@i] }
+        if(!@truc.keys[0].nil? && @truc.keys[0].include?('EXPR_NT'))
+            expr_nt
+        elsif(!@truc.keys[0].nil? && @truc.keys[0].include?('EXPR_T'))
+          @truc = Hash[@truc.sort_by { |key, value| value.length }.reverse!]
+          try_expr
+        elsif !@non_traites.empty?
+          move_backwards
+        else
+          raise 'BUG 2 !!!!!'
+        end
+      end
+
+      def lexe
+        if @i == @tokens.size-1
+          @atteint = true
+        end
+        if !EXPR.select{|key, value| value.include? @tokens[@i]}.nil?
+          expr
+        elsif !@non_traites.empty?
+          move_backwards
+        else
+          raise 'BUG !!!!'
+        end
+      end
+
+      def testlexe
+        cle, valeur = nil
+        compteur = 0
+        while @tokens.size != 1 && compteur < 1000
+          lexe
+          compteur += 1
+        end
+        return false unless @tokens. size == 1 && @tokens[0].eql?('EXPR')
+        return true
+      end
+    end
+  end
+end
diff --git a/lib/parser2.rb b/lib/parser2.rb
new file mode 100644
index 0000000..3c7af34
--- /dev/null
+++ b/lib/parser2.rb
@@ -0,0 +1,42 @@
+module Mm2ep
+  module Depend
+    class Parser2
+      attr_reader :tokens
+
+      TOKEN = {
+        'L_PAR' => "(",
+        'NUMBER' => /[0-9]+(\.[0-9]+)?/,
+        'STRING' => /"[^"]*"/,
+        'EQ_OP' => "=",
+        'T_BOOL' => /[tT]rue/,
+        'F_BOOL' => /[fF]alse/,
+        'VAR' => /[a-z][a-zA-Z0-9_]+/,
+        'AND_OP' => "AND",
+        'OR_OP' => "OR",
+        'NOT_OP' => "NOT",
+        'SPACE' => /\s+/,
+        'R_PAR' => ")"
+      }.freeze
+
+
+      def initialize
+        @tokens = []
+      end
+
+      def parse s
+        s = s.split(' ')
+        s.each_with_index do |element, idx|
+          TOKEN.each do |token, regex|
+            next if element.sub!(regex, '').nil?
+            @tokens << token
+            break if element.nil?
+          end
+          @tokens <<'SPACE' unless idx == s.length-1
+        end
+        # puts @tokens
+        @tokens
+      end # def
+
+    end # class
+  end # module
+end # module