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#include <bits/stdc++.h>
using namespace std;
#define cin fin
#define cout fout
ifstream cin ("text.in");
ofstream cout ("text.out");
bool litera(char c) {
if (c >= 'A' && c <= 'Z')
return true;
else if (c >= 'a' && c <= 'z')
return true;
return false;
}
int main()
{
int lg=0,cuv=0;
string s;
getline(cin,s);
int n = s.size();
for (int i=0; i < n; i++) {
if (litera(s[i])) {
cuv++;
while (i < n && litera(s[i])) {
lg++;
i++;
}
}
}
cout << lg/cuv;
return 0;
}