#include <stdio.h>

void main(void){
	const int englishNumber = 26;
	int n = 0;
	scanf("%d",&n);
	char str[1000000] = "a";
	scanf("%s",&str);
	for(int i = 0 ; i < englishNumber ; i++){
		int count = 0;
		for( int j = 0 ; j < n ; j++ ){
			if( i == str[j] - 'A'){
				count++;
			}
		}
		printf("%d",count);
	}
	
}