#include <bits/stdc++.h>

using namespace std;

ifstream in ( "text.in" );
ofstream out ( "text.out" );
char v[] = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
bool ok = false;
int main()
{
    char s[300000];
    in.getline(s,300000);

    int nrcuv=0;
    int lgtotal=0;

for ( int i = 0 ; i < strlen(s) ; ++i )
    if(strchr(v,s[i])!=0)
    {
        lgtotal ++ ;

        if ( ok == false )
        {
            ok = true;
            nrcuv ++;
        }
    }

    else ok=false;

           out <<lgtotal/nrcuv;

           return 0;
}