const tag = (strings, ...values) => {
  return strings.reduce((result, str, i) => {
    const value = values[i - 1];
    const transformed =
      typeof value === "number" ? `[${value ** 2}]` : `{${value}}`;
    return result + transformed + str;
  });
};

const name = "Sofia";
const score = 4;
const level = "gold";

const output = tag`Player: ${name}, Score: ${score}, Rank: ${level}`;
console.log(output);