#include<cstdio>

int main()
{
	int nrcuv=0,len=0,ok=0;
	char c;
	FILE *fin=fopen("text.in","r");
	while (fscanf(fin,"%c",&c)!=EOF)
	{
		if ((c>='a' && c<='z') || (c>='A' && c<='z'))
		{
			++len;
			if (!ok)
				++nrcuv;
			ok=1;
		}
		else
			ok=0;
	}
	fclose(fin);
	FILE *fout=fopen("text.out","w");
	fprintf(fout,"%d\n",len/nrcuv);
	fclose(fout);
	return 0;
}