#include<stdio.h>
FILE *f=fopen("text.in","r"),*g=fopen("text.out","w");
unsigned long nrcuv,nrlit;
int main()
{
int ucuv=0;
char a;
fscanf(f,"%c",&a);
while(!feof(f))
    {
    if((a>='a'&&a<='z') || (a>='A'&&a<='Z'))
        {
            if(ucuv==0)
                {
                ucuv=1;
                nrlit++;
                }
                else
                nrlit++;
        }
        else
        {
        if(ucuv==1)
            nrcuv++;
        ucuv=0;
        }
    fscanf(f,"%c",&a);
    }
fprintf(g,"%ld",nrlit/nrcuv);
fclose(f);
fclose(g);
return 0;
}