#include <stdio.h>
#include <string.h>
int n,i,lg,cuv,ok;
char c;
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c",&c)!=EOF)
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
        {
            lg++;
            if(ok==0) cuv++;
            ok=1;
        }
        else ok=0;
    }
    printf("%d",lg/cuv);
    return 0;
}