#include <stdio.h>
int nrcuv, lcuv;
char c, prevc;
int main()
{
	FILE *fp=fopen("text.in", "r");
	while (c!=EOF)
	{
		c=fgetc(fp);
		if ((('a'<=c && c<='z') || ('A'<=c && c<='Z')))
		{
			lcuv++;
			if (!(('a'<=prevc && prevc<='z') || ('A'<=prevc && prevc<='Z')))
				nrcuv++;
		}
		prevc=c;
	}
	fclose(fp);
	fp=fopen("text.out", "w");
	fprintf(fp, "%d", lcuv/nrcuv);
	fclose(fp);
	return 0;
}