#include<stdio.h>
#include<string.h>
long r,w;
long long i;
char s[10000000];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(s);
    for (i=0;i<=strlen(s);i++)
    {
       if (s[i]<65||s[i]>122)
            w++;
        if (s[i]==' '&&s[i+1]!=' ')
            r++;
        if (s[i]=='-'&&s[i+1]>65&&s[i+1]<=122)
			r++;
    }
    printf("%ld",(strlen(s)-w)/r);
}