#include <stdio.h>

int main()
{
    char c;
    int litere=0,cuvinte=0,k=0;
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c", &c) != EOF)
    {       
           if(c >= 'a' && c <= 'z' || c>='A' && c<= 'Z')
           {
                litere++;
                if(k == 1)
                {
                     cuvinte++;
                     k = 0;
                }
           }else
                k = 1;
    }
    printf("%d", litere/cuvinte);
    return 0;
}