diff --git a/ej03.py b/ej03.py
new file mode 100644
index 0000000..9eb3a4a
--- /dev/null
+++ b/ej03.py
@@ -0,0 +1,7 @@
+import subprocess
+try:
+  subprocess.run(['Notepad.exe',])
+  subprocess.run(['c:/windows/notepad.exe',])
+  subprocess.run(['Notepad.exe','texto.txt'])
+except subprocess.CalledProcessError as e:
+    print(e.output)
\ No newline at end of file