#include<fstream>
#include<string>
#include<cstring>

using namespace std;

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

string s;

int main(  )
{
    getline( in, s );
    int n=s.size();
    int nr_litere= 0;
    int nr_cuvinte= 0;
    for( int i= 0; i<=n; ++i )
    {
        if( ( s[i]>='a' && s[i]<='z' ) || ( s[i]>='A' && s[i]<='Z' ) )
        {
            nr_litere++;
            nr_cuvinte++;
            while( ( s[i]>='a' && s[i]<='z' ) || ( s[i]>='A' && s[i]<='Z' ) )
            {
                ++i;
                ++nr_litere;
            }
        }
    }
    out << nr_litere/nr_cuvinte-1 << '\n';
    return 0;
}