dd

name_of_student = input("")
grade_n = 1
bad_notes = 0
avg_grade = 0
sum = 0

while grade_n <= 12:
    grade = float(input())
    if grade < 4.00:
        bad_notes += 1
        if bad_notes > 1:
            print(f"{name_of_student} has been excluded at {grade_n} grade")
            break
    else:
        grade_n += 1
        sum += grade

if bad_notes < 2:
    avg_grade = sum / 12
    print(f"{name_of_student} graduated. Average grade: {avg_grade:.2f}")