A

#include <bits/stdc++.h>

using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)

int main()
{
    _test
    {
        int n, m, q;
        cin>>n>>m>>q;

        string s;
        cin>>s;

        int mmax = m;
        int tot = m;

        for(auto e: s)
        {
            m += (e == '+');
            m -= (e == '-');

            mmax = max(mmax, m);
            tot += (e == '+');
        }

        if(mmax == n)
            cout<<"YES\n";
        else if(tot >= n)
            cout<<"MAYBE\n";
        else
            cout<<"NO\n";
    }
}