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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int nrc, nrt=1, ma;
string S;
bool verifyChar(char c)
{
return ((c>='a' && c<='z') || (c>='A' && c<='Z'));
}
int main()
{
ifstream f("text.in");
ofstream g("text.out");
getline(f,S);
for(int i=0; i<=S.size(); i++){
if(verifyChar(S[i]))
nrc++;
if(S[i]==' ')
nrt++;
}
g << nrc / nrt;
return 0;
}