#include<fstream.h>
#include<string.h>
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{char a[50000];
int nr1=0,nr2=0,x,i;
fin.get(a,50000);
x=strlen(a);
for(i=0;i<=x-1;i++)
    {if(a[i]>='A'&&a[i]<='z')
	 nr1++;

     if(a[i]>='A'&&a[i]<='z'&&(a[i-1]<'A'||a[i-1]>'z'))
	nr2++;
    }
fout<<nr1/nr2;


fin.close();
fout.close();
return 0;
}