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.set_bid(symbol, bid)
        self.set_ask(symbol, ask)
        
    def set_bid(self, symbol: str, bid: int):
        self.value[symbol][0] = bid   
        
    def set_ask(self, symbol: str, ask: int):
        self.value[symbol][1] = ask
        
    def get_bid(self, symbol: str):
        return self.value[symbol][0]
    
    def get_ask(self, symbol: str):
        return self.value[symbol][1]