#include <stdlib.h>
#include <stdio.h>

int main()
{
FILE* input;
input = fopen("text.in","r");
int count = 0;
int total = 0;
while( !feof(input) )
{
	int c = fgetc(input);
	if ( c  == (int)(' ') )
	{
		count++;
	}
	if ( ( 64 < c && c < 91 ) || ( 96 < c && c < 123 ) )
	{
		++total;
	}
}
FILE* output;
output = fopen("text.out","w");
fprintf(output,"%d",total/(count+1));
fclose(input);
return 0;
}