diff --git a/main.js b/main.js
index 80b010c7..e42f2abc 100644
--- a/main.js
+++ b/main.js
@@ -44,13 +44,9 @@ async function main() {
             }
         ]
         uniqueInputSets.forEach((inputSet) => {
-            const occurrences = Object.values(inputSet).reduce((occurrences, val) => {
-                if (val !== '') {
-                    occurrences++
-                }
-                return occurrences
-            },0)
-            if(occurrences > 1) {
+            const inputs = Object.values(inputSet)
+            const providedInputs = inputs.filter(input => input !== '')
+            if (providedInputs.length > 1) {
                 throw new Error(`The following inputs cannot be used together: ${Object.keys(inputSet).join(", ")}`)
             }
         })