#include <fstream>
#include <cstring>

using namespace std;

int lung=0, cuv=0, med, i, ok;
char s;

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

int nr = 0;

int main(){

    while( fin.get(s) ){
        if (s == '\n') {
            nr++;
            if (nr == 2) {
                while (1) {

                }

            }
        }
        if( ( 'A' <= s && s <= 'Z' ) || ( 'a' <= s && s <= 'z' ) ){
            lung++;
            ok = 1;
        }else{
            if( ok == 1 ){
                cuv++;
                ok = 0;
            }
        }
    }

    fout<<nr;

/*
    fin.get(s, 11000000);
    for (i=0;s[i]!=0;i++)
        if ((s[i] >= 'a' && s[i]<='z') || (s[i] >= 'A' && s[i]<='Z'))
            s[i] = '1';
        else
            s[i] = '0';

    for (i=0;s[i]!=0;i++) {
        if (s[i] == '1')
            lung++;
    }

    for (i=1;s[i-1]!=0;i++)
        if (s[i]!='1' && s[i-1] == '1')
            cuv++;



    med=lung/cuv;

    fout<<med;

*/

    return 0;
}