#include<stdio.h>
#include<ctype.h>
#include<string.h>
FILE *f=fopen("text.in","r");
FILE *g=fopen("text.out","w");
int main()
{
	char s[500000];
	fscanf(f,"%s",&s);
	int i,cuv=0,lit=0;
	bool ok=1;
	for (i=0;i<strlen(s);i++)
	{
		if (isalpha(s[i]))
		{
			ok=0;
			lit++;}
		else if (ok==0)
		{
			cuv++;
			ok=1;
		}
	}
	fprintf(g,"%d",lit/cuv);
	return 0;
}