[테스트]1

function solution(phone){
	let result=""

  var num1 = phone.substring(0,2)
  var num2 = phone.substring(2,6)
  var num3 = phone.substring(6,10)

	result = 0+num1+'-'+num2+'-'+num3
  
  return result;
}
console.log(solution("1062509911"))