#!/usr/bin/env python

import fileinput
import time
import os

keyPressTotal = 0
timeStart = 0

for line in fileinput.input():
    if timeStart is 0:
        timeStart = time.time()

    keyPressTotal += 1
    os.system('clear')
    print(keyPressTotal / (time.time() - timeStart) * 60)
