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

int main(){
    char ch;
    int nrlitere=0;
    int nrcuv=0;

    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);

    while(3){
        if(ch=='\n'){
            printf("%d",nrlitere/nrcuv);
            return 0;
        }
        while((ch>'z' || ch<'a') && (ch>'Z' || ch<'A')){
            scanf("%c",&ch);
            if(ch=='\n'){
                printf("%d",nrlitere/nrcuv);
                return 0;
            }
        }
        nrcuv++;
        while(3){
            if(!((ch>'z' || ch<'a') && (ch>'Z' || ch<'A'))){
                nrlitere++;
            }else{
                break;
            }
            if(ch=='\n'){
                printf("%d",nrlitere/nrcuv);
                return 0;
            }
            scanf("%c",&ch);
        }
    }
    printf("%d",nrlitere/nrcuv);


    return 0;
}