#include <bits/stdc++.h>

using namespace std;

void solve()
{
    string s1;
    string s2;

    cin >> s1 >> s2;

    bool OK = false;

    for(int mask = 0; !OK && mask < (1 << 3); ++mask)
    {
        string a;
        for(int i = 0; i < 3; ++i)
            if(mask & (1 << i))
                a += s1[i];
            else
                a += s2[i];

        if(a == "bob" || a == "obb" || a == "bbo")
            OK = true;
    }

    if(OK)
        cout << "yes\n";
    else
        cout << "no\n";
}

int main()
{
    ios_base :: sync_with_stdio(false);
    cin.tie(NULL);

    int t;
    cin >> t;

    while(t --> 0)
        solve();

    return 0;
}