#include <cstdio>

using namespace std;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    unsigned long long total=0,cuvinte=0;
    char x,y;
    while(x!='\n')
    {
        scanf("%c",&x);
        if(x=='\n') break;
        else
        {
            if((x>='A'&&x<='Z')||(x>='a'&&x<='z'))
            {
                total++;
                if(y==' ') {cuvinte++;y=x;}
            }
            else y=' ';
        }

    }
    printf("%llu",total/cuvinte);
}