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

using namespace std;
FILE *fin=fopen("text.in","r");
FILE *fout=fopen("text.out","w");

char c;
int nr,nrcuv,ok;

int main()
{
    while (fscanf(fin,"%c",&c)&&c!=10)
    {
        if (isalpha(c))
        nr++;
        else
        {
            if (ok==1)
            nrcuv++;
            while (!isalpha(c)&&c!='\n')
            fscanf(fin,"%c",&c);
            if (c!=10)
            nr++;
            ok=1;
        }
    }
    fprintf(fout,"%d",nr/nrcuv);
    return 0;
}