//Cool Words
//Zero Judge e.706
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#include<math.h>
int main(){
int n;
int a = 0;
while(scanf("%d", &n) !=EOF){
char str[10000];
int cool_word = 0;
for(int i=0; i<n; i++){
scanf("%s", str);
int cnt[10000] = {0};
int alpha[26] = {0};
for(int i=0; i<strlen(str); i++){
alpha[toupper(str[i]) - 'A']++;
}
for(int i=0; i<26; i++){
if(alpha[i] != 0 && (cnt[alpha[i]] == 1 || alpha[i] == strlen(str))){
cool_word--;
break;
}
cnt[alpha[i]] = 1;
}
cool_word++;
}
a++;
printf("Case %d: %d\n", a, cool_word);
}
}