import sys
from itertools import islice


def _solve(N, D):
    for d in D:
        if d == 1:
            yield 10
        else:
            yield 9 * (10 ** (d - 1))


def solve(in_):
    N = int(next(in_))
    D = list(map(int, islice(in_, N)))
    return _solve(N, D)


def main():
    answer = solve(sys.stdin.buffer)
    print('\n'.join(map(str, answer)))


if __name__ == '__main__':
    main()