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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
string s,t;
int sum=0, nr=0,ok=0;
int main()
{
getline(fin,s);
int n=s.size();
for (int i=0; i<n; i++)
{
if((s[i]>='A' && s[i]<='Z') || (s[i]>='a' && s[i]<='z')) {sum++; ok=1; }
else if(ok>0){ ok=0; nr++; }
}
if(ok>0) sum++;
fout<<sum/nr;
}