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

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

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