#!/usr/bin/python3

speed = 1
accelerators = []
for i, device in enumerate(input().split()):
    if device == '+':
        speed += 1
        accelerators.append(i)
    else:
        if speed == 1:
            print(i)
        else:
            speed -= 1
            accelerators.pop(0)
print(*accelerators, sep='\n')