#include<ctype.h>
#include<string.h>
#include<fstream.h>
char a[10000];
ifstream f("text.in");
ofstream g("text.out");
int main()
{int l=0,c=0;
while(!f.eof())
{f.get(a,10000);
for(int i=0;i<strlen(a);i++)
if(isalpha(a[i])!=0)
	{l++;
	if(isalpha(a[i+1])==0) c++;
	}
f.get();
}
g<<l/c;
return 0;
}