#include <cstdio>

using namespace std;
long s,cuv,r,z;
char c;
FILE *f,*g;
int main()
{
f=fopen("text.in","r");
g=fopen("text.out","w");
z=fscanf(f,"%c",&c);
while (z-1==0)
    {
    if (((c>='a')&&(c<='z'))||((c>='A')&&(c<='Z')))
        {
        if (cuv==0) r++;
        cuv=1; s++;
        }
        else
        cuv=0;
    z=fscanf(f,"%c",&c);
    }
if (r!=0)
fprintf(g,"%ld",s/r);
else
fprintf(g,"0");
fclose(f); fclose(g);
return 0;
}