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#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int litera(char chch){
if((chch>='a' && chch<='z')||(chch>='A' && chch<='Z')) return 1;
return 0;
}
int main()
{
ifstream f("text.in");
ofstream g("text.out");
int k=0,cuv=0,litere=0;
string charchar;
getline(f,charchar);
for(int i=0;i<charchar.size();i++)
{
if(litera(charchar[i]))
{
litere++;
k++;
if(k==1)
{cuv++;}
}
else k=0;
}
if(cuv!=0)
g<<litere/cuv<<"\n";
else g<<"0"<<"\n";
return 0;
}