#include<bits/stdc++.h>
using namespace std;
int T,n;
string s[10];
int main(){
    // ios::sync_with_stdio(0);
    // cin.tie(0);
    cin>>T;
    while(T--){
        cin>>n>>s[1]>>s[7];
        for(int i=2;i<=6;++i){
            s[i]=s[1];
            for(int j=0;j<n;++j) s[i][j]='.';
        }
        int bg1=-1,ed1=-2;
        int bg2=-1,ed2=-2;
        for(int i=0;i<n;++i){
            if(s[1][i]=='.'){
                if(bg1==-1) bg1=ed1=i;
                else if(ed1==i-1) ed1=i;
            }
            if(s[7][i]=='.'){
                if(bg2==-1) bg2=ed2=i;
                else if(ed2==i-1) ed2=i;
            }
        }
        if(bg1==-1){
            if(bg2==-1){
                for(int i=2;i<=6;++i) s[i]=s[1];
                cout<<"Yes\n";
                for(int i=1;i<=7;++i)
                    cout<<s[i]<<'\n';
            }else if(bg2==0&&ed2==n-1){
                cout<<"Yes\n";
                for(int i=1;i<=7;++i)
                    cout<<s[i]<<'\n';
            }else{
                cout<<"No\n";
            }
        }else if(bg2==-1){
            if(bg1==-1||(bg1==0&&ed1==n-1)){
                cout<<"Yes\n";
                for(int i=1;i<=7;++i)
                    cout<<s[i]<<'\n';
            }else{
                cout<<"No\n";
            }
        }else if(bg1==0&&ed1==n-1){
            for(int i=0;i<n;++i){
                // if(s[1][i]=='.') s[2][i]='#';
                if(s[7][i]=='.') s[6][i]='#';
            }
            cout<<"Yes\n";
            for(int i=1;i<=7;++i) cout<<s[i]<<'\n';
        }else if(bg2==0&&ed2==n-1){
            for(int i=0;i<n;++i){
                if(s[1][i]=='.') s[2][i]='#';
                // if(s[7][i]=='.') s[6][i]='#';
            }
            cout<<"Yes\n";
            for(int i=1;i<=7;++i) cout<<s[i]<<'\n';
        }else{
            // cerr<<"fk\n";
            for(int i=0;i<n;++i){
                if(s[1][i]=='.') s[2][i]='#';
                if(s[7][i]=='.') s[6][i]='#';
            }
            int p1=bg1-1;
            if(p1<0) p1=ed1+1;
            int p2=bg2-1;
            if(p2<0) p2=ed2+1;
            s[3][p1]='#',s[5][p2]='#';
            if(p1>p2) swap(p1,p2);
            if(p1==p2){
                s[4][p1]='#';
            }else if(p1==p2-1){
                s[4][p1]='#';
            }else{
                for(int i=p1+1;i<=p2-1;++i)
                    s[4][i]='#';
            }
            cout<<"Yes\n";
            for(int i=1;i<=7;++i) cout<<s[i]<<'\n';
        }
    }
    return 0;
}