#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>

bool isNotAlpha(char ch)
{
	return !isalpha(ch);
}

bool isPalindrome(std::string sentence)
{
	std::string::iterator newend = 
			remove_if(sentence.begin(), sentence.end(), isNotAlpha);
	sentence.erase(newend, sentence.end());
	transform(sentence.begin(), sentence.end(), sentence.begin(), tolower);
	std::string sentence_r = sentence;
	reverse(sentence_r.begin(), sentence_r.end());
	return (sentence == sentence_r);
}

int main(int argc, char** argv)
{
	if (argc < 2)
	{
		std::cout << "With args next time." << std::endl;
		return 0;
	}
	if (isPalindrome(argv[1]))
	{
		std::cout << "Is." << std::endl;
	}
	else
	{
		std::cout << "Isn't." << std::endl;
	}
	return 0;
}