#include<cstdio>
#include<cstring>
#include<cctype>

FILE *in,*out;

using namespace std;

int main()
{
    in=fopen("text.in","rt");

    char c;
    int nrc=0;
    int nrl=0;
    bool ok=false;

    while(!feof(in))
    {
        fscanf(in,"%c",&c);
        if(isalpha(c))
        {
            nrl++;
            if(ok==false)
            {
                nrc++;
                ok=true;
            }
        }
        else
            ok=false;
    }
    fclose(in);

    out=fopen("text.out","wt");
    fprintf(out,"%ld",nrl/nrc);
    fclose(out);

    return 0;
}