#include <stdio.h>
int main(void)
{
	FILE *f,*g;
	int i=1,nrcuv=0,nrlit=0;
	char c[10000],ok=0;

	f=fopen("text.in","r");
	g=fopen("text.out","w");
	while((c[i]=getc(f)) !=EOF)
	{
		if( ((c[i]>=65)&&(c[i]<=90)) || ((c[i]>=97)&&(c[i]<=122)) )
		{
			nrlit++;
			if(ok==0) { ok=1; nrcuv++;}
		}
		else ok=0;
	}
	fprintf(g,"%d",nrlit/nrcuv);
	printf("%d",nrlit/nrcuv);
	return 0;
}