n = int(input())
d = {}
for i in range(n):
    s = str(input())
    e = s.count('^')
    if e not in d:
        d[e] = 1
    else:
        d[e] += 1

kv = list(d.items())
kv.sort()
max_ = -1
ans = -1
for k, v in kv:
    if v >= max_:
        max_ = v
        ans = k
print(ans)