#include<fstream>
#include<cstring>
using namespace std;
char s[1000001];
long long nr,nrc,i;
ifstream f("text.in");
ofstream g("text.out");
main()
{f.getline(s,1000000);
if(s[0]==' '||s[0]=='-') nr=0;
else nr=1;
for(i=0;s[i]!=NULL;i++){if(s[i]==' '||s[i]=='-') {if(s[i+1]!=' ')nr++;}
                       else if(s[i]>='a'&&s[i]<='z')nrc++;
					   else if(s[i]>='A'&&s[i]<='Z')nrc++;}
					   g<<nrc/nr;
f.close();
g.close();}