#include <cstdio>
#include <ctype.h>

using namespace std;
FILE *f, *g;

int main()
{
    int cuv=0, lit=0;
    char c1=' ';
    char c2;

    f = fopen("text.in", "r");
    g = fopen("text.out", "w");
    while(!feof(f))
    {
        fscanf(f, "%c", &c2);
        if(isalpha(c2))
            {lit++;
            if(!isalpha(c1))
                cuv++;}
        c1=c2;
    }
    fprintf(g, "%d", lit/cuv);
    return 0;
}