#include <stdio.h>

int cnt(char s[], char x) {
    int cnt = 0;
    for (int i = 0; s[i] != '\0'; i++) {
        if (s[i] == x) {
            cnt++;
        }
    }
    return cnt;
}

int main(void) {
    int N;
    scanf("%d", &N);

    char S[N + 1];  // 終端文字を考慮して +1
    scanf("%s", S);

    char A[27] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    char c[27];
    for (int i = 0; i < 26; i++) {
        int k = cnt(S, A[i]);
        c[i] = '0' + k;
    }
    c[26] = '\0';

    printf("%s\n", c);

    return 0;
}