diff --git a/2022_05_Trieste/DAY4_AM_2_Z2Pack b/2022_05_Trieste/DAY4_AM_2_Z2Pack
new file mode 160000
index 0000000..a3da4fd
--- /dev/null
+++ b/2022_05_Trieste/DAY4_AM_2_Z2Pack
@@ -0,0 +1 @@
+Subproject commit a3da4fd4699b396b03f678741c02f285d1648bef