let N = Int(readLine()!)!
var numArr = [0,0,0,0,0,0,0,0,0,0]
for _ in 1...N{
    let hintArr = readLine()!.split(separator:" ")
    for i in hintArr[0...3]{
        if hintArr[4] == "YES"{
            numArr[Int(i)!] += 1
        }else{
            numArr[Int(i)!] -= 1
        }
    }
}

let max = numArr.max()!
let index = numArr.firstIndex(of: max)!
print(index)