module.exports = function cc(names) {
  if (typeof names === "string" || typeof names === "number") return "" + names

  let out = ""

  if (Array.isArray(names)) {
    for (let i = 0, tmp; i < names.length; i++) {
      if ((tmp = cc(names[i])) !== "") {
        out += (out && " ") + tmp
      }
    }
  } else {
    for (let k in names) {
      if (names[k]) out += (out && " ") + k
    }
  }

  return out
}