/* Kristoffer Hansen. arnsfelt@daimi.au.dk */

#include <iostream>
#include <string>

int isleap(int y)
{
  return (y%4==0 && (y%100!=0 || y%400==0));
}

int cumdim[12+1]  = {0,0,31,59,90,120,151,181,212,243,273,304,334};

int y1,m1,d1,h1,min1,s1;
int y2,m2,d2,h2,min2,s2;

int dy,dm,dd,dh,dmin,ds;

int k;
string period;

int main()
{
  int y;

  while (cin >> y1 >> m1 >> d1 >> h1 >> min1 >> s1
	     >> y2 >> m2 >> d2 >> h2 >> min2 >> s2
	     >> k >> period) {

    ds = ((((cumdim[m2]+d2+(m2>2 && isleap(y2)))*24 + h2)*60 + min2)*60 + s2)
       - ((((cumdim[m1]+d1+(m1>2 && isleap(y1)))*24 + h1)*60 + min1)*60 + s1);

    dmin = (((cumdim[m2]+d2+(m2>2 && isleap(y2)))*24 + h2)*60 + min2)
         - (((cumdim[m1]+d1+(m1>2 && isleap(y1)))*24 + h1)*60 + min1);

    dh = ((cumdim[m2]+d2+(m2>2 && isleap(y2)))*24 + h2)
       - ((cumdim[m1]+d1+(m1>2 && isleap(y1)))*24 + h1);

    dd = (cumdim[m2]+d2+(m2>2 && isleap(y2)))
       - (cumdim[m1]+d1+(m1>2 && isleap(y1)));

    for (y=y1; y<y2; y++) {
      ds += (365+isleap(y))*24*60*60;
      dmin += (365+isleap(y))*24*60;
      dh += (365+isleap(y))*24;
      dd += 365+isleap(y);
    }

    dm = 12*(y2-y1)+m2-m1;

    dy = y2-y1;

    if (dmin>0 && s1>0) 
      dmin--;

    if (dh>0 && min1+s1>0)
      dh--;

    if (dd>0 && h1+min1+s1>0) 
      dd--;
    
    if (dm>0 && d1+h1+min1+s1>0) 
      dm--;

    if (dy>0 && m1+d1+h1+min1+s1>0)
      dy--;

    if (period=="second")
      cout << ds/k;
    else if (period=="minute")
      cout << dmin/k;
    else if (period=="hour")
      cout << dh/k;
    else if (period=="day")
      cout << dd/k;
    else if (period=="month")
      cout << dm/k;
    else if (period=="year")
      cout << dy/k;
    cout << "\n";
  }
  return 0;
}