def f(k):
    return -k[1], -k[2], k[0]


a = open('input.txt', 'r', encoding='utf-8')
mx = 0
schools = []  # [номер школы, максимальный балл школы, количество учеников школы, у которых максимальный балл среди всех учеников всех школ]

for x in a.readlines():
    fn, ln, school, score = x.split()
    school = int(school)
    score = int(score)

    if score == mx:
        found = False
        for sch in schools:
            if sch[0] == school:
                sch[2] += 1
        if not found:
            schools.append([school, score, 1])
    if score > mx:
        found = False
        for sch in schools:
            if sch[0] == school:
                sch[2] = 1
            else:
                sch[2] = 0
        if not found:
            schools.append([school, score, 1])

    if score > mx:
        mx = score

a.close()
a = open('output.txt', 'w')
first_print = True
schools.sort(key=f)
mx_count = schools[0][2]

i = 0
while schools[i][1] == mx and schools[i][2] == mx_count:
    if first_print:
        print(schools[i][0], end='', file=a)
        first_print = False
    else:
        print('\n' + str(schools[i][0]), end='', file=a)
    i += 1