diff --git a/lab3/concat.sh b/lab3/concat.sh
new file mode 100755
index 0000000..21f868a
--- /dev/null
+++ b/lab3/concat.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+rm -rf initial.dat final.dat
+cat *_initial.dat >> initial.dat
+cat *_final.dat >> final.dat