#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
ifstream fin ("text.in");
ofstream fout ("text.out");
char a[1000];
void citire()
{
fin.get(a,1000);
}
int nrcuvinte()
{
int nr=0,i=0,j=1;
while(a[i])
{
if(a[i]>='a' && a[i]<='z' || a[i]>='A' && a[i]<='Z')
{
while(a[i]>='a' && a[i]<='z' || a[i]>='A' && a[i]<='Z')
i++;
nr++;
}
else
i++;
}
return nr;
}
int lungimetot()
{
int nr=0,j=1,i=0;
while(a[i])
{
if(a[i]>='a' && a[i]<='z' || a[i]>='A' && a[i]<='Z')
{
while(a[i]>='a' && a[i]<='z' || a[i]>='A' && a[i]<='Z')
{i++;nr++;}
}
else
i++;
}
return nr;
}
int main()
{
citire();
fout<<lungimetot()/nrcuvinte();
return 0;
}