II.03-speed-check.py

speed = float(input())

if speed > 1000:
    print("extremely fast")
elif speed <= 1000 and speed > 150:
    print("ultra fast")
elif speed <= 150 and speed > 50:
    print("fast")
elif speed <= 50 and speed > 10:
    print("average")
else:
    print("slow")