m,kg=map(float,input().split())
b=kg/m/m
if b < 18.5:
    print("偏瘦")
elif (b>=18.5 and b<23.9):
    print("正常")    
elif (b>=24 and b<27.9):
    print("偏胖")   
elif (b>=28 and b<39.9):
    print("肥胖")  
else:
    print("极重度肥胖")