diff --git a/src/combine.ts b/src/combine.ts
new file mode 100644
index 0000000..1cbba14
--- /dev/null
+++ b/src/combine.ts
@@ -0,0 +1,15 @@
+function combine(x: number, list: number[]): number[][] {
+    if (x === 0) {
+        return [[]];
+    } else if (x === 1) {
+        return list.map(e => [e]);
+    } else {
+        const combinations: number[][] = [];
+        for (let i = 0; i < list.length; i++) {
+            for (const subcombination of combine(x - 1, list.slice(i + 1))) {
+                combinations.push([list[i], ...subcombination]);
+            }
+        }
+        return combinations;
+    }
+}