diff --git a/false.txt b/false.txt
new file mode 100755
index 0000000..a9e96a6
--- /dev/null
+++ b/false.txt
@@ -0,0 +1,6 @@
+#!./main
+
+int main(int argc, char **argv)
+{
+  return 1;
+}
diff --git a/true.txt b/true.txt
new file mode 100755
index 0000000..48d2b0d
--- /dev/null
+++ b/true.txt
@@ -0,0 +1,6 @@
+#!./main
+
+int main(int argc, char **argv)
+{
+  return 0;
+}