from collections import Counter, defaultdict


def main():
    S = input()
    kadomatsu_letter_num = defaultdict(int)
    kadomatsu_letter_num.update(Counter("kadomatsu"))

    partial_letter_num = Counter(S)

    for letter, value in partial_letter_num.items():
        if kadomatsu_letter_num[letter] < value:
            print("No")
            break

    else:
        print("Yes")


if __name__ == "__main__":
    main()