#include <stdio.h>
FILE *in,*o;
char a,u;
int nr,nrc,r;
main()
{
in=fopen("text.in","r");
o=fopen("text.out","w");
u='0';
while (!feof(in))
 {
 fscanf(in,"%c",&a);
 if (a>=65 && a<=90 || a>=97 && a<=122)
  {
  nr++;
  if (u<=96 &&  u>=91 || u<=64 ||  u>=123)
   nrc++;
  }
 u=a;
 }

r=nr/nrc;
fprintf(o,"%d",r);
fclose(in);
fclose(o);
return 0;
}