n=int(input())
num=[0]*10
for i in range(n):
	s=list(map(str,input().split()))
	if s[4]=="YES":
		for j in range(4):
			num[int(s[j])]+=1
	elif s[4]=="NO":
		for j in range(4):
			num[int(s[j])]-=1
print(num.index(max(num)))