#include <iostream>
#include <fstream>
#include <string>

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


int main()
{
    int L=0,NR=0;
    char prec;
    char act;
    fin>>prec;
    if(isalpha(prec))
        L++;
    while(fin.get(act))
    {
        if(isalpha(act))
            L++;
            else
        if(isalpha(prec))
            {NR++;}

        prec=act;
    }
    fout<<L/NR;
    return 0;
}