#include <stdio.h>

using namespace std;
FILE *f,*g;
int main()
{
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    long long lg=0,nrcuv=0,med;
    bool cuv=false;
    char c;
    c=fgetc(f);
    while(!feof(f))
    {
        if(c>='a' && c<='z' || c>='A' && c<='Z')
        {
            lg++;
            if(!cuv)
            {
                nrcuv++;
                cuv=true;
            }

        }
        else if(cuv)
            cuv=false;
        c=fgetc(f);
    }
    med=lg/nrcuv;
    fprintf(g,"%lld",med);
    return 0;
}