#include<bits/stdc++.h>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
typedef long long ll;




int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    cout.tie(0);

    string s;
    getline(in,s);
    ll cnt=0;
    int n=s.size();
    for(int i=0;i<n;++i){
       if(s[i]>='a'&&s[i]<='z')++cnt;
       if(s[i]>='A'&&s[i]<='Z')++cnt;
    }
    ll cnt2=0;
    if((s[0]>='a'&&s[0]<='z')||(s[0]>='A'&&s[0]<='Z'))cnt2=1;
    for(int i=1;i<n;++i){
        int ok=((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z'));
        int ok2=((s[i-1]>='a'&&s[i-1]<='z')||(s[i-1]>='A'&&s[i-1]<='Z'));
        cnt2+=(ok&&!ok2);
    }
    out<<cnt/cnt2<<'\n';



    return 0;
}