#!/usr/bin/env python

import sys
import fileinput
import matplotlib.pyplot as plt
import matplotlib.lines as lines

xs = []
ys = []

for line in fileinput.input():
	xs.append(float(line.split(',')[0]))
	ys.append(float(line.split(',')[1]))

if len(xs) == 0 or len(ys) == 0:
	sys.exit(1)

xs.append(xs[0])
ys.append(ys[0])

####

lineList = []

it = 0
while it < len(xs)-1:
	p = plt.plot(xs[it], ys[it], "o", color = "blue")
	plt.annotate(it, (xs[it], ys[it]))
	it = it+1

it = -1
while it < len(xs)-1:
	plt.plot([xs[it], xs[it+1]], [ys[it], ys[it+1]], "k-")
	it = it+1

plt.show()