export function symmetricDifference<T>(...sets: Iterable<T>[]): Set<T> {
  let result = new Set(sets[0])
  const elementsThatAreInMultipleSets = new Set()
  for (const set of sets.slice(1)) {
    for (const element of set) {
      if (!elementsThatAreInMultipleSets.has(element)) {
        if (result.has(element)) {
          elementsThatAreInMultipleSets.add(element)
          result.delete(element)
        } else {
          result.add(element)
        }
      }
    }
  }
  return result
}