from functools import cache
from bisect import bisect_left, bisect_right
import heapq
from itertools import product
from itertools import permutations
import random
import math
import bisect
import sys
from collections import defaultdict
from itertools import combinations
sys.setrecursionlimit(10**7)
inf = 1 << 60


def sgn(x):
    if x > 0:
        return 1
    elif x == 0:
        return 0
    else:
        return -1


def popC(x):
    ans = 0
    while x != 0:
        ans += x % 2
        x //= 2
    return ans


def exit():
    sys.exit()


def LI():
    return list(map(int, input().split()))


def II():
    return int(input())


def SI():
    return input()


n = input()
x = int(n[::-1])
for i in range(x):
    a, b = input().split()
    a = int(a[::-1])
    b = int(b[::-1])
    print(a, b)