func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 1e9+7, M = (1e9+7), MAXN = 1 * 2e5;   int A[MAXN], C[MAXN];            int64_t modpow(int64_t a, int64_t b) {       int64_t res = 1;       for(; b; b >>= 1) {           if(b&1)               res=res*a%M;           a=a*a%M;       }       return res;   }   void solve() {       const int MOD = M;       int N, M;       cin >> N >> M;       vector<string> G(N);       for(int i = 0; i < N; i++)           cin >> G[i];          int cnt = 0;       for(int i = 0; i < N; i++)           cnt += count(G[i].begin(), G[i].end(),  # );       cerr <<  Count:   << cnt << endl;       int64_t x = modpow(2, cnt);       if(cnt == N * M) {           cout << (x - 1 + MOD) % MOD << endl;       } else {           cout << modpow(2, cnt) << endl;       }   }   int main() {       cin.tie(0)->sync_with_stdio(0);       int T; cin >> T;          while(T--) {           solve();       }   }   