#include<bits/stdc++.h>

using namespace std;
using pii = pair<int, int>;

int n, m, px, py;
pii pos;

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    string s = "";
    auto ask = [&] () {
        int r, c;
        cout << "? " << s << endl;
        cin >> r >> c;
        pos = pii(r, c);
        return;
    };
    if (n < m) {
        int cnt = 0;
        for (int j = 0; j < m; j++) {
            s = string(j, '>') + string(n - 1, 'v');
            ask(); cnt++;
            assert(cnt <= 50);
            if (pos != pii(n - 1, j)) {
                if (pos.second != j) {
                    cout << "! " << 0 << ' ' << pos.second + 1 << endl;
                } else {
                    cout << "! " << pos.first + 1 << ' ' << pos.second << endl; 
                }
                return 0;
            }
        }
    } else {
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            s = string(i, 'v') + string(m - 1, '>');
            ask(); cnt++;
            assert(cnt <= 50);
            if (pos != pii(i, m - 1)) {
                if (pos.first != i) {
                    cout << "! " << pos.first + 1 << ' ' << 0 << endl;
                } else {
                    cout << "! " << pos.first << ' ' << pos.second + 1 << endl;
                }
                return 0;
            }
        }
    }
}