from collections import defaultdict

Q = int(input())

for case in range(Q):
    S = input()
    T = input()
    N = len(S)

    S1 = ""
    S2 = ""
    T1 = ""
    T2 = ""
    countS1 = defaultdict(int)
    countS2 = defaultdict(int)
    countT1 = defaultdict(int)
    countT2 = defaultdict(int)

    for i in range(N):
        if i%2 == 0:
            S1 += S[i]
            T1 += T[i]
            countS1[S[i]] += 1
            countT1[T[i]] += 1
        else:
            S2 += S[i]
            T2 += T[i]
            countS2[S[i]] += 1
            countT2[T[i]] += 1


    if (countS1 != countT1) or (countS2 != countT2):
        print("No")
        continue
        

    flag = False
    for [key, val] in countS1:
        if val >= 2:
            flag = True
    for [key, val] in countS2:
        if val >= 2:
            flag = True

    if flag:
        print("Yes")
        continue

    invS1 = 0
    invS2 = 0
    invT1 = 0
    invT2 = 0
    for i in range(len(S1)):
        for j in range(i+1,len(S1)):
            if ord(S1[i]) > ord(S1[j]):
                invS1 += 1
            if ord(T1[i]) > ord(T1[j]):
                invT1 += 1

    for i in range(len(S2)):
        for j in range(i+1,len(S2)):
            if ord(S2[i]) > ord(S2[j]):
                invS2 += 1
            if ord(T2[i]) > ord(T2[j]):
                invT2 += 1

    diff1 = abs(invS1-invT1)
    diff2 = abs(invS2-invT2)

    if (diff1%2==0) and (diff2%2==0):
        print("Yes")
    elif (diff1%2==1) and (diff2%2==1):
        print("Yes")
    else:
        print("No")