#include <cstdio>
#define dim 1000000
#include <string.h>
#define infile "text.in"
#define outfile "text.out"
using namespace std;
char ch;
int i,nrlit,nrcuv,k;
int main()
{
    freopen(infile,"r",stdin);
    freopen(outfile,"w",stdout);
    while(scanf("%c",&ch)!=EOF)
    {
        if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
        {
            nrlit++;
            if(k==0)
            {
                k=1;
                nrcuv++;
            }
        }
        else
            k=0;
    }
    nrcuv=nrlit/nrcuv;
    printf("%d",nrcuv);
    return 0;
}