n=int(input())
e=0
if(n>=90 or n==100):
    if(n>100):
        print("error")
        e+=1
        if(e==0):
            print("Excellent")
    if(n>=90 and n<=100):      
        print("Excellent")
elif(n>=70 and n<=80):
    print("good")
elif(n>=0 and n<=69):    
    print("normal")