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

int main()
{
    FILE*fin,*fout;
    int cuv=0;
    long long nrcuv=0,nrlit=0;
		char a;
		fin = fopen("text.in" ,"r");
		fout = fopen("text.out" ,"w");
		a=fgetc(fin);
		while(a!=EOF){
				if((a>='a' && a<='z') || (a>='A' && a<='Z')){
						if(cuv==0){
								cuv=1;
								nrcuv++;
						}
						nrlit++;
				}
				else{
						cuv=0;
				}
				a=fgetc(fin);
		}
		fprintf(fout, "%lld\n" ,nrlit/nrcuv);
		fclose(fin);
		fclose(fout);
    return 0;
}