E.py

#===========Template===============
from io import BytesIO, IOBase
import sys,os
inpl=lambda:list(map(int,input().split()))
inpm=lambda:map(int,input().split())
inpi=lambda:int(input())
inp=lambda:input()
rev,ra,l=reversed,range,len
P=print
BUFSIZE = 8192
class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
def input(): return sys.stdin.readline().rstrip("\r\n")

#=========I/p O/p ========================================#
from bisect import bisect_left as bl 
from bisect import bisect_right as br
import sys,operator,math,operator
from collections import Counter,deque

import random
#==============To chaliye shuru krte he====================#
tc=inpi()
while tc:
    tc-=1
    n=int(input())
    arr=list(map(int,input().split()))
    last=0
    q=deque()
    ans=[]
    for i in range(n):
        if arr[i]>last:
            ans.append(arr[i])
            for j in range(last+1,arr[i]):
                q.append(j)
            last=arr[i]
        else:
            el=q.popleft()
            ans.append(el)
 
    print(*ans)
    ans=[]
    last=0
    for i in range(n):
        if arr[i]>last:
            ans.append(arr[i])
            for j in range(last+1,arr[i]):
                q.append(j)
            last=arr[i]
        else:
            el=q.pop()
            ans.append(el)
    print(*ans)       
        # while i<n:
        #     if ma[i]==0:
        #         j=i
        #         c=ma[i-1]-1
        #         while j<n and ma[j]==0:
        #             if c not in omap:
        #                 ma[j]=c
        #                 omap[c]=1
        #                 j+=1
        #             c-=1
                
        #         j=i
        #         while j<n and mi[j]==0:
        #             if track not in omap1:
        #                 mi[j]=track
        #                 omap1[track]=1
        #                 j+=1
        #             track+=1
        #         i=j
        #     else:i+=1
        # P(*mi)
        # P(*ma)