import Foundation
let n = Int(readLine()!)!
var l = [Int]()
for _ in 1...n{
    let s = readLine()!
    l += [s.count - s.replacingOccurrences(of: "^", with: "").count]
}
var d = [Int:Int]()
let s = Set(l)

for i in s{
    var c = 0
    for j in l{
        c += i == j ? 1 : 0
    }
    d[i] = c
}
var k = 0
var v = 0
for i in d{
    if i.value >= v{
        v = i.value
        k = i.key
    }
}
print(k)