

int main(){

	char zimu[27] = "abcdefghijklmnopqrstuvwxyz";
	int num[26] = {0};

	char zfc[LEN];

	int len, i, flag;

	scanf("%s", zfc);

	len = strlen(zfc);

	for(i = 0; i < len; i++){
		
		if(zfc[i]-'a' >= 0 && zfc[i]-'a' <= 25){
			num[zfc[i]-'a']++;
		}

	}

	flag = 1;
	for(i = 0; i < 26; i++){
		if(num[i] != 0){
			printf("%c=%d\n", zimu[i], num[i]);
			flag = 0;
		}
	}

	if(flag){
		printf("No");
	}

	return 0;
}