#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int i,nrl,nrcuv,k,n;
char c[1000002];
int main()
{
    fin.getline(c,1000002);
    n=strlen(c);
    for(i=0;i<n;i++)
    {
        if(k==1&&(c[i]>='a'&&c[i]<='z'||c[i]>='A'&&c[i]<='Z'))
        {
            nrl++;
        }
        else
        {
            k=0;
        }
        if(k==0&&(c[i]>='A'&&c[i]<='Z'||c[i]>='a'&&c[i]<='z'))
        {
            k=1;
            nrcuv++;
            nrl++;
        }
    }
    fout<<nrl/nrcuv;
    return 0;
}