#include <fstream>
#include <string>
#include <string.h>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char i[100000];
int main()
{
    fin.getline(i,100000);
    int m=strlen(i);

    int x=0,nrcuv=0,nrlit=0,inceputcuv=0;
    for(x=0;x<m;x++)
    {
        if(isalpha(i[x]))
        {
            nrlit++;
            inceputcuv=1;

        }

        else
        {
            if(inceputcuv==1)nrcuv++;
            inceputcuv=0;
        }
    }
    if(nrlit==0)fout<<"0";
    else fout<<nrlit/nrcuv;
    return 0;
}