def func(x):
res = "GCV"
if(x % 3 == 0):
res = "GCV"
elif((x - 1) % 3 == 0):
res = "VGC"
else:
res = "CVG"
print(res)
x = int(input())
func(x)
ZGVmIGZ1bmMoeCk6CglyZXMgPSAiR0NWIgoJaWYoeCAlIDMgPT0gMCk6CgkJcmVzID0gIkdDViIKCWVsaWYoKHggLSAxKSAlIDMgPT0gMCk6CgkJcmVzID0gIlZHQyIKCWVsc2U6CgkJcmVzID0gIkNWRyIKCXByaW50KHJlcykKeCA9IGludChpbnB1dCgpKQkKZnVuYyh4KQk=