#include<stdio.h>

main()
{
	FILE *in,*out;
	int litere = 0;
	int cuvinte = 0;
	char c;
	char x;
	int nc;
	
	in = fopen("text.in","r");
	out = fopen("text.out","w");
	
	while(!feof(in))
	{
		fscanf(in,"%c",&c);
		if((c >= 'a')&&(c <= 'z')||(c >= 'A')&&(c <= 'Z'))
		{
		
			litere++;
			x = c;
			nc = 0;
		}
		else 
		{
		
			nc = 1;
			if (((x >= 'a')&&(x <= 'z')||(x >= 'A')&&(x <= 'Z'))&& nc)
			{
			
				cuvinte++;
				x = c;
			}
		}
		
			
		
	}

	fprintf(out,"%d",litere/cuvinte);
	
	fclose(in);
	fclose(out);
}