diff --git a/introductions/johnrivera.py b/introductions/johnrivera.py
new file mode 100644
index 0000000..85da8ca
--- /dev/null
+++ b/introductions/johnrivera.py
@@ -0,0 +1,4 @@
+from introductions import johnrivera
+def main():
+   # other intros
+   johnrivera.intro()
\ No newline at end of file
diff --git a/introductions/m81.v b/introductions/m81.v
new file mode 100644
index 0000000..6d51171
--- /dev/null
+++ b/introductions/m81.v
@@ -0,0 +1,14 @@
+`timescale 1ns/1ps
+
+module m81(input D0, D1, D2, D3, D4, D5, D6, D7, S0, S1, S2, output out);
+    wire T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11;
+    not(T1, S0); // ~A
+    not(T2, S1); // ~B
+    not(T3, S2); // ~C
+
+    and(T4, D0, T1, T2, T3), (T5, D1, S0, T2, T3);
+    and(T6, D2, T1, S1, T3), (T7, D3, S0, S1, T3);
+    and(T8, D4, T1, T2, S2), (T9, D5, S0, T2, S2);
+    and(T10, D6, T1, S1, S2), (T11, D7, S0, S1, S2);
+    or(out, T4, T5, T6, T7, T8, T9, T10, T11);
+endmodule
\ No newline at end of file
diff --git a/main.py b/main.py
index e32d532..d92c09e 100644
--- a/main.py
+++ b/main.py
@@ -10,6 +10,7 @@
 from introductions import mokshithanelluri
 from introductions import matthewschaming
 from introductions import sophiaabbassi
+from introductions import johnrivera
 # Put all imports above this line
 
 def main():
@@ -22,6 +23,7 @@ def main():
     mokshithanelluri.intro()
     matthewschaming.intro()
     sophiaabbassi.intro()
+    johnrivera.intro()
     # Call you intro function above this line