string_explosion

data = input()

output_text = ""
strength = 0
for i in range(len(data)):
    if data[i].isdigit():
        strength += int(data[i])

    if data[i] != ">" and strength > 0:
        strength -= 1

    elif data[i] == ">" and strength > 0:
        output_text += data[i]

    elif strength == 0:
        output_text += data[i]

print(output_text)