L,R = map(int, input().split())
start=""
end=""
if L<=295:
	start="C"
elif L<=416:
	start="Rust"
else:
	start="Python"

if R<=295:
	end="C"
elif R<=416:
	end="Rust"
else:
	end="Python"

language=["C","Rust","Python"]

startl=language.index(start)
endl=language.index(end)

print(endl-startl)