#include<fstream>
#include<string.h>
#include<ctype.h>

using namespace std;

ifstream fin ("text.in");
ofstream fout ("text.out");

char a[1524000];

int main ()
{
    long long b,i,n,l;
    fin.getline(a,1524000);
    n=strlen(a)-1;
    l=1;
    long long lit=0,cuv=0;
    for(i=0;i<=n;i++)
    {
                     if(isalpha(a[i])!=0)
                     {
                                        l=1;
                                        lit++;
                     }
                     else
                     {
                         if(l==1)
                         cuv++;
                         l=0;
                     }
                     }
                     fout<<lit/cuv;
                     return 0;
                     }