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#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int nrc, nrl;
int main()
{ int ok=0;
char x;
fin.get(x);
while (x!='\n'&&(!fin.eof()))
{
if ((x>='a'&&x<='z')||(x>='A'&&x<='Z'))
{
nrl+=1;
if (ok==0)
{
nrc+=1;
ok=1;
}
}
else
ok=0;
fin.get(x);
}
fout<<nrl/nrc;
fout<<'\n';
fin.close();
fout.close();
return 0;
}