function accum(s) {
  let result = ""
	for (let i = 0; i < s.length; i++) {
    for (let a = 0; a < i + 1; a++) {
       a === 0 ? result += s[i].toUpperCase() : result += s[i].toLowerCase()
    }
    i < s.length - 1 ? result += "-" : null
  }
  return result
}