181932

function solution(code) {
  let answer = "";
  let mode = 0;
 
  for (let i = 0; i < code.length; i += 1) {
    if (Number(code[i]) === 1) {
      mode = mode === 1 ? 0 : 1;
    }
    if (Number(code[i]) !== 1 && i % 2 === mode) {
      answer += code[i];
    }
  }
  return answer.length > 0 ? answer : "EMPTY";
}