def main():
    S = input()
    KADOMATSU = "kadomatsu"

    current_idx = 0
    for letter in S:
        current_idx = KADOMATSU.find(letter, current_idx)
        if current_idx == -1:
            print("No")
            break
        current_idx += 1
    else:
        print("Yes")


if __name__ == "__main__":
    main()