let test = number => {
  if (typeof number !== "number") {
    throw new Error("Not a number");
  }

  if (number >= 1 && number <= 100) {
    if (number % 2 === 0) {
      console.log("aa");
    } else if (number % 7 === 0) {
      console.log("bbb");
    } else {
      console.log(number);
    }
  } else {
    throw new Error("Number should be in range from 1 to 100");
  }
};