import sys
sys.setrecursionlimit(5*10**5)
input = sys.stdin.readline
from collections import defaultdict, deque, Counter
from heapq import heappop, heappush
from bisect import bisect_left, bisect_right
from math import gcd

n = int(input())
a = list(map(int,input().split()))
if len(set(a)) != n:
    x = [[] for i in range(max(a)+10)]
    for i in range(n):
        x[a[i]].append(i)
    ok = 1
    p1 = list(range(1, n+1))
    p2 = list(range(1, n+1))

    for i in range(max(a)+10):
        if len(x[i]) >= 2:
            s,t = x[i][0], x[i][1]
            p2[t], p2[s] = p2[s], p2[t]
            break
else:
    ok = 0
    p1 = [0]*(n)
    p2 = [0]*(n)
    s = set([i for i in range(1, n+1)])
    mx = max(a)
    sa = set(a)
    pos = [-1]*(mx+1)
    for i in range(n):
        pos[a[i]] = i
    for xi in range(n):
        x = a[xi]
        for yi in range(i+1, n):
            y = a[yi]
            d = y-x
            if y + d > mx:break
            if 1 + 2 * d > n:break
            if y+d in sa:
                zi = pos[y+2*d]
                p1[xi], p1[yi], p1[zi] =  1+d, 1+d+d, 1
                p2[xi], p2[yi], p2[zi] =  1+d+d, 1, 1+d
                ok = 1
                s.discard(1)
                s.discard(1+d)
                s.discard(1+d+d)
                break
        if ok:break
            

    s = list(s)
    for i in range(n):
        if p1[i]: continue
        num = s.pop()
        p1[i] = num
        p2[i] = num

if ok:
    print(*p1)
    print(*p2)
else:
    print(-1)