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#include <iostream>
#include <fstream>
#include <string>
using namespace std;
ifstream in ("text.in");
ofstream out("text.out");
string s;
int lent=0, nrcuv=0;
int main()
{
getline(in, s);
if(isalpha(s[0])) lent++, nrcuv++;
for(int i=1; i<s.size(); i++)
if(isalpha(s[i]))
{
if(!isalpha(s[i-1]))
nrcuv++;
lent++;
}
if(nrcuv==0)
{
out<<0;
return 0;
}
out<<lent/nrcuv;
return 0;
}