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#include <bits/stdc++.h>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int ok(char x)
{
if((x>='a'&&x<='z')||(x>='A'&&x<='Z'))
return 1;
return 0;
}
char s[1100000];
int last_letter,words,length,i;
int main()
{
f.getline(s,1100000);
last_letter=-5;
words=0;
length=0;
for(i=0; i<strlen(s); i++)
{
if(ok(s[i]))
{
if(last_letter!=i-1)
words++;
length++;
last_letter=i;
}
// g<<i;
}
g<<length/words;
return 0;
}