#include <stdio.h>
#include <string.h>

int main()
{
	char c;
	int n=0,cuv=0,nc;
	
	FILE *in=fopen("text.in","r"),*out=fopen("text.out","w");
	fscanf(in,"%c",&c);
	nc=1;
	while (c!=10)
	{
		if ((c-'a'>=0 && 'z'-c>=0) || (c-'A'>=0 && 'Z'-c>=0))
		{
			if (nc)
			{
				cuv++;
				nc=0;
			}
			n++;
		}
		else
			nc=1;
		fscanf(in,"%c",&c);
	}
	fprintf(out,"%d\n",n/cuv);
	fclose(in);
	fclose(out);
	
	return 0;
}