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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
bool litera(char c){
return (c>='a' && c<='z') || (c>='A' && c<='Z');
}
int main()
{
ifstream f("text.in");
ofstream g("text.out");
string v;
getline(f,v);
bool gatacuvant=false;
int nrcuv=0,nrlitere=0;
for(int i=0;i<v.size();i++){
if(litera(v[i])){
nrlitere++;
if(!gatacuvant){
gatacuvant=true;
nrcuv++;
}
}
else gatacuvant=false;
}
g << nrlitere / max(nrcuv,1) ;
return 0;
}