events.listen('recipes', function (event) {
  materialsToUnify.forEach(function (material) {
      typesToUnify.forEach(function (type) {
          if (!entryIsBlacklisted(material, type)) {
              var tagString = '#forge:' + type + 's/' + material;
              var tag = ingredient.of(tagString);
              if (tag.stacks.size() > 1) {
                  var prefItem = getPreferredItemInTag(tag);
                  // console.log('Tag: ' + tag);
                  // console.log('Prefered item: ' + prefItem);
                  event.replaceOutput({}, tagString, prefItem);
              }
          }
      });
  });
});