#import regex package --> iterate through input, use regex "^[789]\d{9}$" to match to input using findall --> finall returns a list, if list size is not 0 then a match has been found, and print according result

import re

for i in range(int(input())):
    num = input()
    x = re.findall("^[789]\d{9}$", num)
    
    if len(x) > 0:
        print("YES")
    else:
        print("NO")

nums = input()

for x in range(int(nums)):
  t  =  "NO"
  num = input()
  if len(num) == 10:
    if num.isdigit():
        if int(num[0]) in [7,8,9]:
            t = "YES"
  print(t)

import re
N= int(input())
patron =r'^[7|8|9]\d{9}'
for i in range (N):
    s = input()
    if (re.fullmatch(patron, s )):
        print("YES")
    else:
        print("NO")
        

import re

if __name__ == '__main__':
    n = int(input())
    phone_number = [input() for i in range(n)]
    
    is_phone_valid = []
    
    valid_prefix = ['7','8','9']
    valid_note = ['NO', 'YES']
    
    for i in phone_number:
        note = i.isdigit() and i[0] in valid_prefix and len(i)==10
        is_phone_valid.append(valid_note[note])
    
    print(*is_phone_valid, sep='\n')