#include <bits/stdc++.h>
using namespace std;
int n,m,x,y;
int main(){
    int cnt = 0;
    cin>>n>>m;
    while(1) {
        string st;
        for(int i = 0;i<cnt;i++) st.push_back('v');
        for(int j = 0;j<m;j++) st.push_back('>');
        cout << "? " << st << endl;
        cin>>x>>y;
        if(x!=cnt) {
            cout << "! " << cnt << " " << 0 << endl;
            return 0;
        }
        if(y!=m-1) {
            cout << "! " << x << " " << y+1 << endl;
            return 0;
        }
        cnt++;
    }
}
/*

For C++ programs, first compile it (e.g. with g++ -g -O2 -std=gnu++17 -static
solution.cpp -o solution.out) and then run:
python3 testing_tool.py ./solution.out <<<"4 5 2 3"

/usr/bin/g++ -g -O2 -std=gnu++17 boxbrute.cpp -o solution.out
python3 testing_tool.py ./solution.out <<<"50 50 34 21"

*/