num = input()
lenght = len(num)

for ind in range(lenght, 0, -1):
    current_num =int(num[ind-1])

    if current_num == 0:
        print("ZERO")
        continue
    ascii_char = chr(current_num + 33)

    for column in range(current_num):
        print(ascii_char,end="")
    print()