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

int main()
{
	char sir;
	int nrCuv = 0, lungime = 0,rezultat,ok=0;

	FILE *f=fopen("text.in","r");
	FILE *g=fopen("text.out","w");

	while(fscanf(f,"%c",&sir))
	{
		if( (sir >= 'a' && sir <= 'z') || (sir >= 'A' && sir <= 'Z') )
		{
			lungime++;
			ok=1;
		}
		else if(ok)
		{
			nrCuv++;
			ok=0;
		}

	}


	rezultat = lungime / nrCuv;

    fprintf(g,"%d",rezultat);
    return 0;
}