t = int(input())
if t <= 3:
print("GREEN")
elif t <= 5:
print("RED")
elif t <= 8:
print("GREEN")
elif t <= 10:
print("RED")
elif t <= 13:
print("GREEN")
elif t <= 15:
print("GREEN")
elif t <= 18:
print("RED")
elif t <= 20:
print("GREEN")
elif t <= 23:
print("RED")
elif t <= 25:
print("GREEN")
elif t <= 28:
print("RED")
elif t <= 30:
print("GREEN")
elif t <= 33:
print("RED")
elif t <= 35:
print("GREEN")
elif t <= 38:
print("RED")
elif t <= 40:
print("GREEN")
elif t <= 43:
print("RED")
elif t <= 45:
print("GREEN")
elif t <= 48:
print("RED")
elif t <= 50:
print("GREEN")
elif t <= 53:
print("RED")
elif t <= 55:
print("GREEN")
elif t <= 58:
print("RED")
elif t <= 60:
print("GREEN")
s=input('числа a b c через пробел: ')
(a,b,c)=s.split(' ');
if a>b:
d=a
a=b
b=d
if b>c:
d=b
b=c
c=d
print('среднее по значению: ',b)
# или обмен значений переменных через кортеж
s=input('числа a b c через пробел: ')
(a,b,c)=s.split(' ')
if a>b: a,b=b,a
if b>c: b,c=c,b
print('среднее по значению: ',b)