diff --git a/labs/01/relation_analyser.py b/labs/01/relation_analyser.py
index 6fd8b91..48e1a3f 100644
--- a/labs/01/relation_analyser.py
+++ b/labs/01/relation_analyser.py
@@ -1,36 +1,48 @@
-import graphviz # https://graphviz.readthedocs.io/en/stable/index.html
+#Tuve problemas instalando graphviz por lo que decidi generar un archivo de texto para que lo pueda copiar y pegar en Graphviz online
 
 def analyze(val):
-    """
-    Here goes your code to do the analysis
-    1. Reflexive: aRa for all a in X,
-    2. Symmetric: aRb implies bRa for all a,b in X
-    3. Transitive: aRb and bRc imply aRc for all a,b,c in X,
-    """
-    Reflexive = False
-    Symmetric = False
-    Transitive = False
-
-    return Reflexive,Symmetric,Transitive
-
-def plot():
-    """
-    Here goes your code to do the plot of the set
-    """
-    g = graphviz.Digraph('G', filename='hello.gv')
-    g.edge('Hello', 'World')
-    g.view()
+
+    Reflexivo = all((a, a) in val for a, _ in val)
+    Simetrico = all((b, a) in val for a, b in val)
+    Transitivo = all((a, c) in val for a, b1 in val for b2, c in val if b1 == b2)
+
+    return Reflexivo, Simetrico, Transitivo
+
+def text_graph(val):
+    with open('graph.txt', 'w') as file:
+        file.write('Digraph {\n')
+
+        for pair in val:
+            file.write(f'\t{pair[0]} -> {pair[1]} ;\n')
+
+        file.write('}\n')
 
 def main():
-    print("Hello World analyzing input!")
-    val = input("Enter your set: ")
-    print(val)
-    Reflexive,Symmetric,Transitive = analyze(val)
-    print(f"\
-    1. Reflexive: {Reflexive} \
-    2. Symmetric: {Symmetric} \
-    3. Transitive: {Transitive}")
-    plot()
+    print("Set:")
+    val_str = input("Ingresa tu set en el formato { (a,b), (c,d), (e,f) ... }: ")
+    val = eval(val_str)  # Convierte string a una tupla
+
+    Reflexivo, Simetrico, Transitivo = analyze(val)
+
+    if Reflexivo:
+        print("R es reflexivo.")
+    else:
+        print("R no es reflexivo.")
+
+    if Simetrico:
+        print("R es simetrico.")
+    else:
+        print("R no es simetrico.")
+
+    if Transitivo:
+        print("R es transitivo.")
+    else:
+        print("R no es transitivo.")
+
+    if Reflexivo and Simetrico and Transitivo:
+        print("R tiene una relación equivalente")
+
+    text_graph(val)
 
 if __name__ == "__main__":
     main()
diff --git a/labs/03/grammar.l b/labs/03/grammar.l
new file mode 100644
index 0000000..a06174e
--- /dev/null
+++ b/labs/03/grammar.l
@@ -0,0 +1,20 @@
+%{
+#include "y.tab.h"
+%}
+
+%%
+
+"a"                     { return ARTICLE; }
+"the"                   { return ARTICLE; }
+"boy"|"girl"|"flower"   { return NOUN; }
+"touches"|"likes"|"sees" { return VERB; }
+"with"                  { return PREP; }
+\n                      { return EOL; }
+.                       { /* ignore anything else */ }
+
+%%
+
+int yywrap() {
+    return 1;
+}
+
diff --git a/labs/03/grammar.y b/labs/03/grammar.y
new file mode 100644
index 0000000..9148005
--- /dev/null
+++ b/labs/03/grammar.y
@@ -0,0 +1,67 @@
+%{
+#include <stdio.h>
+
+int yylex();
+void yyerror(const char *s);
+
+#define PASS 1
+#define FAIL 0
+
+extern FILE* yyin;
+
+%}
+
+%token ARTICLE NOUN VERB PREP EOL
+
+%%
+
+sentence_list: sentence EOL        { if ($1 == PASS) printf("PASS\n"); else printf("FAIL\n"); }
+             | sentence_list sentence EOL { if ($2 == PASS) printf("PASS\n"); else printf("FAIL\n"); }
+             ;
+
+sentence: noun_phrase verb_phrase    { $$ = $1 && $2; }
+        ;
+
+noun_phrase: cmplx_noun              { $$ = $1; }
+           | cmplx_noun prep_phrase  { $$ = $1 && $2; }
+           ;
+
+verb_phrase: cmplx_verb              { $$ = $1; }
+           | cmplx_verb prep_phrase  { $$ = $1 && $2; }
+           ;
+
+prep_phrase: PREP cmplx_noun         { $$ = $2; }
+           ;
+
+cmplx_noun: ARTICLE NOUN             { $$ = PASS; }
+          ;
+
+cmplx_verb: VERB                     { $$ = PASS; }
+          | VERB noun_phrase         { $$ = $2; }
+          ;
+
+%%
+
+void yyerror(const char *s) {
+    fprintf(stderr, "%s\n", s);
+}
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        printf("Usage: %s <input_file>\n", argv[0]);
+        return 1;
+    }
+
+    FILE *input_file = fopen(argv[1], "r");
+    if (!input_file) {
+        perror("Error opening file");
+        return 1;
+    }
+
+    yyin = input_file;
+    yyparse();
+    fclose(input_file);
+
+    return 0;
+}
+