package main

import (
	"fmt"
)

func main() {
	var n int
	fmt.Scan(&n)
	var a, b, c, d int
	var r string
	nums := make([]int, 10)
	for i := 0; i < n; i++ {
		fmt.Scan(&a, &b, &c, &d, &r)
		numsran := []int{a, b, c, d}
		if r == "NO" {
			for _, j := range numsran {
				nums[j] = -1
			}
		}
		if r == "YES" {
			for _, j := range numsran {
				if nums[j] >= 0 {
					nums[j] += 1
				}
			}
		}
	}
	max := 0
	var ans int
	for i := 0; i < 10; i++ {
		if nums[i] >= max {
			ans = i
			max = nums[i]
		}
	}
	fmt.Println(ans)
}