理解题目！！理解题目！！理解题目！！理解题目！！

不要拿起键盘就瞎JB写！！！！

let [total, start, ...arr] = readline().split(" ").map(Number);
const rmVal = arr.pop();
let res = [start];
for (let i = 0; i < arr.length; i += 2) {
  const val = arr[i];
  const head = arr[i + 1];
  const index = res.findIndex((val) => val === head);
  res.splice(index+1, 0, val);
}
print(
  res
    .filter((n) => n !== rmVal)
    .join(" ")
);