09. Rage Quit

word = input()
string = ''
rage_quit_message = ''

for i in range(len(word)):
    if word[i].isdigit():
        count_str = word[i]
        if i + 1 < len(word) and word[i + 1].isdigit():
            count_str += word[i + 1]
        count = int(count_str)
        rage_quit_message += string.upper() * count
        string = ''
    else:
        string += word[i]

symbols_count = (len(set(rage_quit_message)))
print(f"Unique symbols used: {symbols_count}")
print(rage_quit_message)