#!/usr/bin/env python3
# from typing import *


def main():
    N = int(input())
    d = [None for _ in range(N)]
    for i in range(N):
        d[i] = int(input())
    for i in range(N):
        print(10 ** d[i] - 10 ** (d[i] - 1))

if __name__ == '__main__':
    main()