## https://yukicoder.me/problems/no/2707


def main():
    N = int(input())
    S = input()

    answer = [0] * 26
    for s in S:
        answer[ord(s) - ord("A")] += 1

    print("".join(map(str, answer)))






    





                





    
        















if __name__ == "__main__":
    main()