#include <stdio.h>
FILE *f=fopen("text.in","r"),*g=fopen("text.out","w");
long long nrlit=0,nrcuv=0;
bool k=0;
char ch;

int main()
{
    while(!feof(f)){
        fscanf(f,"%c",&ch);
        if ((ch>='a' && ch<='z') ||(ch>='A' && ch<='Z')){
            nrlit++;
            k=1;
        }
        else if(k==1){
            nrcuv++;
            k=0;
        }
    }
    fprintf(g,"%lld",nrlit/nrcuv);
    return 0;
}