#!/usr/bin/env python3
import sys
import re

# Regex to capture the last floating-point number before "tokens per second"
pattern = re.compile(r'([\d.]+)\s+tokens per second')

values = []
for line in sys.stdin:
    match = pattern.search(line)
    if match:
        values.append(float(match.group(1)))

if not values:
    print("Average tokens per second: 0.00")
else:
    num = len(values)
    avg = sum(values) / num
    print(f"Average tokens per second: {avg:.2f} out of {num} samples")