#include<cstdio>
int nr1,nr2,ok;
char c;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    nr1=0;
    nr2=0;
    while(!feof(stdin))
    {
        if(feof(stdin)) break;
        scanf("%c",&c);
        ok=0;
        while((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        {
            ok=1;
            nr1++;
            scanf("%c",&c);
        }
        if(ok==1) nr2++;
    }
    printf("%d",nr1/nr2);
    return 0;
}