diff --git a/truth_table2.txt b/truth_table2.txt
new file mode 100644
index 0000000..fb6637c
--- /dev/null
+++ b/truth_table2.txt
@@ -0,0 +1,11 @@
+DEF TRUTH_TABLE2
+    PORT IN A
+    PORT IN B
+    PORT IN C
+    PORT OUT Z
+
+    NET D
+
+    INST NAND1 NAND A C D
+    INST NAND3 NAND B D Z
+ENDDEF