#include<bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define endl '\n'
using namespace std;
using ll=long long;
using db=double;
using pii=pair<int,int>;

int dig(int r,int c)
{
    cout << "DIG " << r << ' ' << c << endl;
    cin >> r;
    return r;
}
int scan(int r,int c)
{
    cout << "SCAN " << r << ' ' << c << endl;
    cin >> r;
    return r;
}
void solve()
{
    int n,m;
    cin >> n >> m;
    int sum=scan(1,1)+4;
    int sumx=(scan(1,m)+sum-2*m-2)/2,sumy=sum-sumx;
    int disx=scan(sumx/2,1)-sumy+2,disy=scan(1,sumy/2)-sumx+2;
    int x1=(sumx-disx)/2,y1=(sumy-disy)/2,x2=sumx-x1,y2=sumy-y1;
    if(dig(x1,y1))
        dig(x2,y2);
    else
        dig(x1,y2),dig(x2,y1);
}
int main()
{
    ios::sync_with_stdio(false);
    int t;
    cin >> t;
    while(t--)
        solve();
    return 0;
}