n=int(input())
kex=0
gay1=''
gay2=''
sex=2
for i in range(n):
    a,b,c,d=map(str,input().split())
    d=int(d)
    if d>kex:
        kex = d
        gay1=a+' '+b
        gay2=''
        sex=2
    elif d==kex:
        if gay1!='':
            if gay2!='':
                sex=sex+1
            else:
                gay2=a+' '+b
        else:
            gay2=a+' '+b
if sex!=2:
    print(sex)
elif gay2=='':
    print(gay1)
else:
    print(gay1,gay2,sep='\n')