diff --git a/input.txt b/input.txt
new file mode 100644
index 0000000..ee53213
--- /dev/null
+++ b/input.txt
@@ -0,0 +1,4 @@
+0, 0
+1, 0
+0, 1
+1, 1
\ No newline at end of file
diff --git a/target.txt b/target.txt
new file mode 100644
index 0000000..99470a5
--- /dev/null
+++ b/target.txt
@@ -0,0 +1,4 @@
+-1
+-1
+-1
+1
\ No newline at end of file