#include<stdio.h>

int main()
{
    char c;
    int ok = 0, litere = 0, cuvinte = 0;
    FILE *fin, *fout;
    fin = fopen("text.in", "rt");
    fout = fopen("text.out", "wt");
    while( c=fgetc(fin) )
    {
        if( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') )
        {
            litere++;
            if( !ok )
            {
                cuvinte++;
                ok = 1;
            }            
        }
        else 
        {
            ok = 0;
            if(c == EOF) break;
        }
    }
    fprintf(fout, "%i",litere/cuvinte);
    return 0;
}