#include <cstdio>
#include <cstring>
#include <fstream>

int main()
{
	int i,n,nrcuv,nrlit;
	char s[1000001],d=26;
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	gets(s);
	n=strlen(s);
	nrcuv=nrlit=0;
	if(isalpha(s[0]))
	{
		nrcuv++;
		nrlit++;
	}
	for(i=1;i<=n;++i)
	{
		if(isalpha(s[i]))
		{
			nrlit++;
			if(!isalpha(s[i-1])) nrcuv++;
		}
	}
	printf("%d",nrlit/nrcuv);
	return 0;
}