function gradiation(input) {
    let name = input.shift();
    let grade = 0;
    let summark = 0;

    while (grade <= 12) {
      let mark = Number(input.shift());
      if(!isNaN(mark)) {
          summark += mark;
      }
          grade++;
    }
    let averagemark = summark / grade;

    if (averagemark >= 4.0) {
      console.log(`${name} graduated. Average grade: ${averagemark.toFixed(2)}`);
    } else {
      console.log(`${name} not graduated. Average grade: ${averagemark.toFixed(2)}`);
    }
  }