#include <iostream>
#include <string>
	using namespace std;
#include <stdio.h>
string num[20] =
	{
		"zero",
		"one",
		"two",
		"three",
		"four",
		"five",
		"six",
		"seven",
		"eight",
		"nine",
		"ten",
		"eleven",
		"twelve",
		"thirteen",
		"fourteen",
		"fifteen",
		"sixteen",
		"seventeen",
		"eighteen",
		"nineteen",
	};
string num2[8] = 
{
	"twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"
}	;
string dd[100];
int pos=0;
void parse(string s)
{
	unsigned int p=0,n;
		while(1)
	{
		n = s.find(" ",p);
		dd[pos] = s.substr(p,n-p);
		//cout << dd[pos];
		//cout << dd[x] << endl;
		pos++;
		p = n+1;
		if (n == string::npos)
			return;

	}
}

int bas=1;
int final = 1;
int p1()
{
	int t;
	for (t=0;t<20;t++)
	{
		if (num[t] == dd[pos])
			return t;
	}
	for (t=0;t<8;t++)
	{
		if (num2[t] == dd[pos])
			return (2+t)*10;
	}
	if (dd[pos] == "hundred")
	{
		bas *= 100;
		return 0;
	}
	if (dd[pos] == "thousand")
	{
		bas = 1000;
		return 0;
	}
	if (dd[pos] == "million")
	{
		bas = 1000000;
		return 0;
	}
	if (dd[pos] == "negative")
	{
		final = -1;
		return 0;
	}

	cout << "chyba" << endl;
	return -1;
}

int main()
{
	
	//parse("ninety nine");
	//parse("two hundred ninety nine");
	//	parse("eight hundred fifteen million nine hundred twenty five thousand fifteen");

	string s;
	while (1)
	{
		bas =1;
		final = 1;
		pos = 0;
		getline(cin,s);
		if (s=="") return 0;
		parse(s);
	
		int c=0;
		pos--;
		while (pos >= 0)
		{
			c += p1()*bas;
			pos --;
		}
		cout << c*final << endl;
	}
	return 0;
}