#include<fstream.h> 
#include<stdio.h> 
int main() 
{     
char c='a';    
int x=0,nr=0,y   
FILE *f=fopen("text.in","r");    
ofstream fcout("text.out"); 
y=c-'0'+48;
while(y!="/n"-'0'+48){
fscanf(f,"%c",c);y=c-'0'+48;
if(y<='z'-'0'+48&&y>='A'-'0'+48)nr++;
else x++;}    
fcout<<nr/x;     
return 0; 
}