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#include <iostream>
#include <fstream>
using namespace std;
int ver(char ch){
if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))return 1;
return 0;
};
int main(){
ifstream f("text.in");
ofstream g("text.out");
int i,cuv,chr,ok;
char a[100000];
ok=chr=cuv=0;
i=1;
while(f>>noskipws>>a[i]){
if(ver(a[i])){
if(ok){
chr++;
}
else{
ok=1;
cuv++;
chr++;
}
}
else ok=0;
i++;
}
g<<chr/cuv;
f.close();
g.close();
return 0;
}