#include<iostream>
#include<regex>

using namespace std;

void main()
{
	//phone number
	//501 279-4340
	//(501) 279-4340
	//(501)279-4340
	//(501)-279-4340
	//501-279-4340
	//501.279.4340

//	regex expression("[0-9][0-9][0-9]-[0-9][0-9][0-9]-[0-9][0-9][0-9][0-9]");
//	regex expression("[0-9]{3}-[0-9]{3}-[0-9]{4}");

	regex expression("(([(][0-9]{3}[)])|([0-9]{3}))[ -.]?[0-9]{3}[ -.]?[0-9]{4}");

	//regex ssnExpression("[0-9]{3}-[0-9][0-9]-[0-9]{4}");
	regex emailExpression(".+@.+[.]((...)|(....)|(.....))");

	string s;
	getline(cin,s);

	if(regex_match(s,emailExpression))
	{
		cout << "It matched" << endl;
	}

}