#include <stdio.h>
#include <stdlib.h>

static const char *
ws (const char *p)
{
  while (*p == ' ' || *p == '\t')
    p++;
  return p;
}

#define LEN(STR) (sizeof (STR) - 1)
#define CMP(PTR, STR) (memcmp (PTR, STR, LEN (STR)))

int
main (void)
{
  char buf[10240];

  while (gets (buf) && *buf != 0)
    {
      const char *p;
      int val, sign, tmp;

      val = 0;
      sign = 1;
      tmp = 0;
      p = buf;
      for (;;)
	{
	  p = ws (p);
	  if (*p == 0)
	    break;
	  if (CMP (p, "negative") == 0)
	    {
	      p += LEN ("negative");
	      sign = -1;
	    }
	  else if (CMP (p, "hundred") == 0)
	    {
	      p += LEN ("hundred");
	      if (tmp == 0)
		tmp = 1;
	      tmp *= 100;
	    }
	  else if (CMP (p, "thousand") == 0)
	    {
	      p += LEN ("thousand");
	      if (tmp == 0)
		tmp = 1;
	      val += tmp * 1000;
	      tmp = 0;
	    }
	  else if (CMP (p, "million") == 0)
	    {
	      p += LEN ("million");
	      if (tmp == 0)
		tmp = 1;
	      val += tmp * 1000000;
	      tmp = 0;
	    }
	  else
	    {
	      static const struct
	      {
		const char *str;
		size_t len;
		int val;
	      } vals[] =
		{
#define V(S, V) { S, LEN (S), V }
		  V ("eleven", 11), V ("twelve", 12), V ("thirteen", 13),
		  V ("fourteen", 14), V ("fifteen", 15), V ("sixteen", 16),
		  V ("seventeen", 17), V ("eighteen", 18), V ("nineteen", 19),
		  V ("twenty", 20), V ("thirty", 30), V ("forty", 40),
		  V ("fifty", 50), V ("sixty", 60), V ("seventy", 70),
		  V ("eighty", 80), V ("ninety", 90),
		  V ("zero", 0), V ("one", 1), V ("two", 2), V ("three", 3),
		  V ("four", 4), V ("five", 5), V ("six", 6), V ("seven", 7),
		  V ("eight", 8), V ("nine", 9), V ("ten", 10)
		};
		  
	      size_t i;

	      for (i = 0; i < sizeof (vals) / sizeof (*vals); i++)
		{
		  if (memcmp (p, vals[i].str, vals[i].len) == 0)
		    {
		      p += vals[i].len;
		      tmp += vals[i].val;
		      break;
		    }
		}
	      if (i == sizeof (vals) / sizeof (*vals))
		abort ();
	    }
	}
      val += tmp;
      val *= sign;
      printf ("%d\n", val);
    }
  return EXIT_SUCCESS;
}