#include <stdio.h>
int main()
{
    FILE *fin, *fout;
    int nrcuv=0,n,tot=0,incuv=0;
    char c;
    fin=fopen("text.in","r");
    fout=fopen("text.out","w");
    c=fgetc(fin);
    while(c!=EOF)
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
        {
            tot++;
            incuv=1;
        }
        else
            if(incuv==1)
            {
                incuv=0;
                nrcuv++;
            }
        c=fgetc(fin);
    }
    fprintf(fout,"%d\n",tot/nrcuv);
    fclose(fin);
    fclose(fout);
    return 0;
}