tovars,prices,recomendations= [],[],[]
for i in range(6):
    name = input()
    tovar = input()
    price = int(input())
    if tovar in tovars:
        if prices[tovars.index(tovar)] > price:
            prices[tovars.index(tovar)] = price
        recomendations[tovars.index(tovar)] +=1
    else:
        tovars.append(tovar)
        prices.append(price)
        recomendations.append(1)
if recomendations.count(max(recomendations)) == 1:
    print(tovars[recomendations.index(max(recomendations))])
else:
    ans = []
    ans1 = []
    l = len(tovars)
    mm = max(recomendations)
    for i in range(l):
        if recomendations[i]  == mm:
            ans.append(tovars[i])
            ans1.append(prices[i])
    print(ans[ans1.index(min(ans1))])