#include<stdio.h>
using namespace std;
FILE *g,*h;
int main()
{
    g=fopen("text.in","r");
    h=fopen("text.out","w");
    int nrcuv=0,nr_litere=0,am_gasit_litera=0;
    char c;
    while(1)
    {
        fscanf(g,"%c",&c);
        if(feof(g)) break;
        if(c>='A' && c<='Z' || c>='a' && c<='z')
        {
            nr_litere++;
            am_gasit_litera=1;
        }
        else
        {
            if(am_gasit_litera)
            {
                am_gasit_litera=0;
                nrcuv++;
            }
        }
    }
   fprintf(h,"%d",nr_litere/nrcuv);
   return 0;
}