#include<cstdio>
#include<cstring>
#define maxn 2000007

using namespace std;

FILE *f=fopen("text.in","r");
FILE *g=fopen("text.out","w");

char a[maxn];

int i,n,p,k;

int ch(char x)
{
    if((x>='a'&&x<='z')||(x>='A'&&x<='Z'))
        return 1;
    return 0;
}

int main()
{
    fgets(a,sizeof(a),f);

    n=strlen(a);

    for(i=0;i<=n;++i)
        if(ch(a[i]))
            ++k;
        else
            if(i)
                if(ch(a[i-1]))
                    ++p;

    fprintf(g,"%d\n",k/p);

    fclose(f);
    fclose(g);

    return 0;
}