with open("in.txt", 'r') as inf:
    s = inf.readline().strip()

result = ''
start_index = 0
while start_index < len(s):
    character = s[start_index]
    number = s[start_index + 1]
    for j in range(start_index + 2, len(s)):
        if s[j] < 'A':
            number += s[j]
        else:
            result += character * int(number)
            start_index += len(character) + len(number)
            break

with open("out.txt", 'w') as ouf:
    ouf.write(str(result))