#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
	FILE*iFile=fopen("text.in","r"),*oFile=fopen("text.out","w");
	char s[1000];int i,s1=0,s2=0;bool k=1;
	fgets(s,1000,iFile);
	for(i=1;i<strlen(s);i++)
	{
		if((s[i]>='a'&&s[i]<='z')||(s[i]<='A'&&s[i]>='Z'))
			s1++;
		else
			k=1;
		if(((s[i]>='a'&&s[i]<='z')||(s[i]<='A'&&s[i]>='Z'))&&k)
		{
			s2++;k=0;
		}
	}
	fprintf(oFile,"%i",s1/s2);
}