Submission #72909785

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#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0;i<n;i++)
#define srep(i,l,r) for(ll i=l;i<=r;i++)
#define irep(i,r,l) for(ll i=r;i>=l;i--)
using ll = long long;
using ld = long double;
const ll mod=998244353;
#define vout(v) for(auto i :v) cout<<i<<" "; cout<<"\n";
#define INF 9223300000000000000ll
#define Winf 5e12
#define nl "\n"
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define vl vector<ll>
#define pb push_back
#define vc vector<char>
#define vb vector<bool>
#define uniq(x) sort((x).begin(),(x).end());(x).erase(unique((x).begin(),(x).end()),(x).end())
#define eb emplace_back
 
 
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#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0;i<n;i++)
#define srep(i,l,r) for(ll i=l;i<=r;i++)
#define irep(i,r,l) for(ll i=r;i>=l;i--)
using ll = long long;
using ld = long double;
const ll mod=998244353;
#define vout(v) for(auto i :v) cout<<i<<" "; cout<<"\n";
#define INF 9223300000000000000ll
#define Winf 5e12
#define nl "\n"
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define vl vector<ll>
#define pb push_back
#define vc vector<char>
#define vb vector<bool>
#define uniq(x) sort((x).begin(),(x).end());(x).erase(unique((x).begin(),(x).end()),(x).end())
#define eb emplace_back



void no(void) { cout<<"No"<<nl;}
void yes(void) {cout<<"Yes"<<nl;}
void yn(bool a) {
    cout<<(a ? "Yes":"No")<<nl;
}


vector<ll> dx={-1,0,1,0,1,1,-1,-1};
vector<ll> dy={0,-1,0,1,-1,1,-1,1};

bool isin(ll i,ll j,ll h,ll w) {
    if(i<0 || i>=h || j<0 || j>=w) return false;
    return true;
}

template<typename T> bool chmin(T& a, T b){if(a > b){a = b; return true;} return false;}
template<typename T> bool chmax(T& a, T b){if(a < b){a = b; return true;} return false;}


template<class T>T vecmax(const vector<T>&v){return *max_element(all(v));}
template<class T>T vecmin(const vector<T>&v){return *min_element(all(v));}

ll safemod(ll num,ll rule) {
    return (num%rule+rule)%rule;
}

ll sum(vector<ll> &a) {
    return accumulate(all(a),0ll);
}
template<class T>void vvpr(vector<vector<T>> g) {
    rep(i,g.size()) {
        rep(j,g[i].size()) {
            cout<<g[i][j]<<(j==g[i].size()-1 ? "\n":" ");
        }
    }
}

int main() {
    ll t; cin>>t;
    while(t--) {
        ll n,c; cin>>n>>c;
        vector<vc> g(n,vc(n));
        rep(i,n) rep(j,n) {
            char ch; cin>>ch;
            g[i][j]=ch;
        }
        vector<vl> cab(n,vl(n));
        rep(j,n) {
            bool bl=true;
            irep(i,n-1,0) {
                if(g[i][j]=='#') {
                    cab[i][j]=bl;
                    bl=0;
                }
                else cab[i][j]=bl;
            }
        }
        vector<vl> dp(n,vl(n));
        dp[n-1][c-1]=1;
        vl d={-1,0,1};
        irep(i,n-1,1) {
            rep(j,n) {
                if(!dp[i][j]) continue;
                rep(k,3) {
                    ll nj=j+d[k];
                    if(!(0<=nj && nj<n)) continue;
                    if(g[i-1][nj]=='.') dp[i-1][nj]=true;
                    else {
                        if(cab[i-1][nj]) {
                            dp[i-1][nj]=true;
                            ll di=2;
                            while(i-di>=0) {
                                cab[i-di][nj]=1;
                                if(g[i-di][nj]=='#') break;
                                di++;
                            }
                        }
                    }
                }
            }
        }
        string ans="";
        rep(i,n) {
            if(dp[0][i]) ans+='1';
            else ans+='0';
        }
        cout<<ans<<nl;
    }
}

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