import sys
 
def read_until_minus_one():
        buf = []
        seen_minus = False
        while True:
            char = sys.stdin.read(1) 
            if not char: # EOF
                break 
            if char == '1' and seen_minus:
                buf.pop() # chop the last minus
                break # seen -1
            else:
                seen_minus = (char == '-')
                buf.append(char)
        return ''.join(buf)
 
print(read_until_minus_one())

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12 22 -23 13 -12 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23
12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23 12 22 -23 3 -1 23 -1 23