print("foobar".startswith("foo"))
print("foobar".startswith("Foo"))
print("foobar".startswith("foo1"))
print("foobar".startswith("foobar"))
print("foobar".startswith(""))
print("1foobar".startswith("foo", 1))
print("1foo".startswith("foo", 1))
print("1foo".startswith("1foo", 1))
print("1fo".startswith("foo", 1))
print("1fo".startswith("foo", 10))
