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

using namespace std;

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

int isLet(char cev){
    return ((cev>='a'&&cev<='z')||(cev>='A'&&cev<='Z'));
}

int main()
{
    char ceva[1000000];
    fin.getline(ceva,1000000);
    int lungimeTot=0, nrCuv=0;
    bool incep=false;
    for(int i = 0;i<strlen(ceva);i++)
    {
        if(isLet(ceva[i])&&incep==false)
        {
            nrCuv++;
            lungimeTot++;
            incep=true;
        }
        else if(isLet(ceva[i])&&incep==true)
        {
            lungimeTot++;
        }
        else if(!isLet(ceva[i])&&incep==true)
        {
            incep = false;
        }
    }
    int res = lungimeTot/nrCuv;
    fout<<res;
}