def items(n: int) -> str:
return "%d items" % n
def kv(k: str, n: int) -> str:
return "%s=%d" % (k, n)
def frac(x: float) -> str:
return "%f" % x
def pct(n: int) -> str:
return "100%% of %d" % n
def two(a: str, b: str) -> str:
return "%s and %s" % (a, b)