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diff --git a/19.md b/19.md
index 0c42390..c5ad2e5 100644
--- a/19.md
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@@ -65,3 +65,7 @@
 ### Implementation
 
 ![diagram](19.6.png)
+
+---
+
+[1-hot encoding and State machines in Verilog ->](20.md)