diff --git a/src/MultiSet.java b/src/MultiSet.java
new file mode 100644
index 0000000..7c0f41c
--- /dev/null
+++ b/src/MultiSet.java
@@ -0,0 +1,14 @@
+import java.util.List;
+public interface MultiSet<T> {
+    boolean add(T item);
+
+    void remove(T item);
+
+    boolean contains(T item);
+
+    boolean isempty();
+
+    int count(T item);
+
+    int size();
+}