class ValueManager:
    def __init__(self):
        self.value = {
            # symbol: [bid, ask]
            "BOND": [0, 0],
            "GS": [0, 0],
            "MS": [0, 0],
            "VALBZ": [0, 0],
            "VALE": [0, 0],
            "WFC": [0, 0],
            "XLF": [0, 0]
        }
        
    def set_value(self, symbol: str, bid: int, ask: int):
        self.value[symbol] = [bid, ask]
        
    def get_bid(self, symbol: str):
        return self.value[symbol][0]
    
    def get_ask(self, symbol: str):
        return self.value[symbol][1]