[#29][프로그래머스][입문] 외계행성의 나이

function solution(age) {
  let t = String(age).split('');
  let obj = {};
  
  for (let i = 0; i < 10; i++) {
      obj[i] = String.fromCharCode(i + 65).toLowerCase();
  }
  
  let answer = t.reduce((acc, cur) => acc += obj[cur], '');
  return answer;
}