#include <bits/stdc++.h>
#include <atcoder/dsu.hpp>
using namespace std;

using i32 = int;
using i64 = long long;
using i128 = __int128_t;
using f64 = double;
using p2 = pair<i64, i64>;
using p3 = tuple<i64, i64, i64>;

void _main();
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(18);
  _main();
}

void _main() {
  i64 tt;
  cin >> tt;
  for (;tt--;) {
    i64 n, m;
    cin >> n >> m;
    vector<vector<p2>> g(n);
    for (i64 i = 0; i < m; i++) {
      i64 a, b, c;
      cin >> a >> b >> c;
      a--, b--;
      g[a].push_back({b, c});
      g[b].push_back({a, c});
    }
    vector<vector<i64>> dp(n, vector<i64>(2, 1e18));
    dp[0][0] = 0;
    queue<p2> que;
    que.push({0, 0});
    while (!que.empty()) {
      auto [i, j] = que.front();
      que.pop();
      for (auto [ni, c] : g[i]) {
        if (c == 1) {
          if (dp[ni][j] > dp[i][j] + 1) {
            dp[ni][j] = dp[i][j] + 1;
            que.push({ni, j});
          }
        } else {
          if (j == 0 && dp[ni][1] > dp[i][0] + 1) {
            dp[ni][1] = dp[i][0] + 1;
            que.push({ni, 1});
          }
        }
      }
    }
    if (dp[n - 1][0] < 1e18) {
      cout << "Same\n";
      cout << dp[n - 1][0] << "\n";
    } else if (dp[n - 1][1] < 1e18) {
      cout << "Different\n";
      cout << dp[n - 1][1] << "\n";
    } else {
      cout << "Unknown\n";
    }
  }
}