import sys,os,io
input = sys.stdin.readline
#input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline
T = int(input())
ans = [0]*T
for t in range(T):
  n = int(input())
  ans[t] = 9*10**(n-1)
print(*ans, sep='\n')