#include <cstdio>
#include <cstring>
#include <cctype>
using namespace std;
FILE *f,*g;
char *p,s[1000020];
int m,i,cuv,lit;
int main()
{
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    fgets(s+1,1000010,f);
    for(i=1;s[i];i++)
    {
        if(isalpha(s[i]))lit++;
        else
            if(isalpha(s[i-1]))
            cuv++;
    }
    m=lit/cuv;
    fprintf(g,"%d\n",m);
    return 0;
}