#include <fstream>
#include <string.h>
using namespace std;
ifstream cin("text.in");
ofstream cout("text.out");
int main()
{
    int cntcuv=0;
    int cntl=0;
    char lc=0;
    char t;
    while(cin>> noskipws >> t)
    {
        if(lc!=0)
        {
            if(isalpha(lc)&&!isalpha(t))    cntcuv++;
        }
        if(isalpha(t))  cntl++;
        lc=t;
    }
    cout<<cntl/cntcuv;
    return 0;
}