diff --git a/.gitignore b/.gitignore
index d1e1d85..e419ef7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
 *.pyc
 *.pyo
-*.txt
 output/riot_limits.txt
\ No newline at end of file
diff --git a/src/system/xd.txt b/src/system/xd.txt
new file mode 100644
index 0000000..c227083
--- /dev/null
+++ b/src/system/xd.txt
@@ -0,0 +1 @@
+0
\ No newline at end of file