sem_4 / 4

grades = {'Anna': 4, 'Bob': 3, 'Claire': 5, 'Dick': 2, 'Elena': 5,
         'Fred': 5, 'George': 4, 'Kristina': 3, 'Nick': 2,
         'Ursula': 4, 'Viktor': 5}
excel = []
good = []
satisf = []
bad = []

for key, value in grades.items():
    print(key,value)
    if value == 5:
        excel.append(key)
    elif value == 4:
        good.append(key)
    elif value == 3:
        satisf.append(key)
    else:
        bad.append(key)

print(excel)
print(good)
print(satisf)
print(bad)