def func2(tup):
    return tup[1]

def func1(tup):
    return tup[0]

fin = open('input.csv', 'r', encoding='utf8')
fout = open('output8.txt', 'w', encoding='utf8')
val = {}
cnt = list()
for line in fin:
    s = line.split(';')
    if s[0] in val:
        val[s[0]].append(int(s[1]))
    else:
        val[s[0]] = list()
        val[s[0]].append(int(s[1]))
for i in val:
    cnt.append((i, sum(val[i]) / len(val[i])))
cnt = sorted(cnt, key=func1)
cnt = sorted(cnt, key=func2)
for j in range(len(cnt)):
    print(cnt[j][0])
fin.close()