graduation

check_count = 12
x = 0
list_grade = []
list_low_grade = []
aver_list_low_grade = 0.0
a = True
y = 0.0
name = input()
while check_count != 0:
    grade = float(input())
    if list_low_grade:  # Лошия списък не е празен
        list_grade.pop()
        list_grade.append(grade)
        if grade < 4:
            a = False
            break
        else:
            list_low_grade = []

    list_grade.append(grade)

    if grade < 4:
        list_low_grade.append(grade)
    else:
        check_count -= 1
sum_list_grade = sum(list_grade)
len_list_grade = len(list_grade)

average_grade = sum_list_grade / len_list_grade
if a:
    print(f"{name} graduated. Average grade: {average_grade:.2f}")
else:
    print(f"{name} has been excluded at {len_list_grade} grade")