def div(n):
    S = set()
    i = 1
    while i * i <= n:
        if n % i == 0:
            S.add(i)
            S.add(n // i)
        i += 1
    return list(S)

T = int(input())
ans = ["X", "Y"]
for _ in range(T):
    X = list(input())
    Y = list(input())
    flag = 0
    if len(X) <= len(Y):
        flag = 1
        X, Y = Y, X
    minv = 10 ** 18
    for d in div(len(Y)):
        S = set()    
        for i in range(len(Y)//d):
            S.add(tuple(Y[i * d:(i + 1)*d]))
            if len(S) == 2:
                break
        if len(S) == 1 and d < minv:
            minv = d
            ylst = Y[:d]
    ind = 0
    d = minv
    for i in range(len(X)//d):
        xlst = X[i * d:(i + 1)*d]
        if ylst < xlst:
            ind = 0
            break
        elif ylst > xlst:
            ind = 1
            break
    else:
        if len(X) % d == 0:
            ind = 0
        else:
            xlst = X[len(X)//d * d:] * ((len(X) + d - 1)//d)
            if ylst < xlst:
                ind = 0
            elif ylst > xlst:
                ind = 1
    print(ans[ind^flag])