#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2020 <pavle.portic@tilda.center>
#
# Distributed under terms of the BSD 3-Clause license.

text = input().lower()
case = True
output = ''
for c in text:
	if c in [',', '.', ' ', ':', '"', '\'']:
		output += c
		continue

	if case:
		output += c.upper()
	else:
		output += c

	case = not case

print(output)