#include <cstdio>
#include <cctype>
FILE *f=fopen("text.in","r");
FILE *g=fopen("text.out","w");
int i,cuv,k;
char c,z;
int main()
{
	while(!feof(f))
	{
		fscanf(f,"%c",&z);
		if(!isalpha(z))
			c=z;
		if(isalpha(z))
		{
			k++;
			if(!isalpha(c))
			{
				cuv++;
				c=z;
			}
		}
	}
	fprintf(g,"%d",k/cuv);
	fclose(f);
	fclose(g);
	return 0;
}