#include <stdio.h>
#include <stdlib.h>
void citire() {
    FILE *f=fopen("text.in","r");
    FILE *g=fopen("text.out","w");
    int count=0,ok=0,cuv=0;
    char c;
    c=fgetc(f);
    while(c!=EOF)
    {
        ok=0;
        if( (c>='a'&&c<='z') || (c>='A'&&c<='Z'))
                    {
                        count++;
                        ok=1;
                    }
        /*else
            ok=0;*/
        c=fgetc(f);
        if( ((c>='a'&&c<='z') || (c>='A'&&c<='Z'))&&ok==0)
            cuv++;
        }
    fprintf(g,"%d",count/cuv);
}
int main()
{
    citire();
    return 0;
}