import re

N = int(input())

phone_number_list = [ input() for i in range(N) ]

for phone_number in phone_number_list:
    if len(phone_number) == 10 and phone_number.isdigit() and re.match(r"^[789](\d)", phone_number):
        print("YES")
    else:
        print("NO")

# Enter your code here. Read input from STDIN. Print output to STDOUT
import re

# Define regex to start with 7-9, followed with 9 digits
regex = "^[7-9][0-9]{9}$"

n = int(input())
numbers = []

for i in range(n):
    numbers.append(input())
    
for number in numbers:
    if re.match(regex, number):
        print("YES")
    else:
        print("NO")
        

import sys, re

N = sys.stdin.read().splitlines()[1:]
pattern = r"^[789]\d{9}$"

match = ['YES' if re.search(pattern, line) else 'NO' for line in N]

for _ in match:
    print(_)

import re
for i in range(int(input())):
    print('YES' if re.search(r'^[789]\d{9}$', input()) else 'NO')