line = input().strip()
need_ch = []
for i in range(len(line)):
    if line[i].isalpha():
        if line[i+1].isdigit():
            need_ch.append(line[i:i+2])
for vo in need_ch:
    line = line.replace(vo, vo[0] * int(vo[1]))
for i in range(len(line)):
    if line[i].isdigit():
        for j in range(i-1, 0-1, -1):
            if line[j] == '{':
                line = line.replace(line[j:i+1], line[j+1:i-1] * int(line[i]))
                break
print(line)