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

char digit[10][7][5]={
    {
        ".XX.",
        "X..X",
        "X..X",
        "....",
        "X..X",
        "X..X",
        ".XX."
    },
    {
        "....",
        "...X",
        "...X",
        "....",
        "...X",
        "...X",
        "...."
    },
    {
        ".XX.",
        "...X",
        "...X",
        ".XX.",
        "X...",
        "X...",
        ".XX."
    },
    {
        ".XX.",
        "...X",
        "...X",
        ".XX.",
        "...X",
        "...X",
        ".XX."
    },
    {
        "....",
        "X..X",
        "X..X",
        ".XX.",
        "...X",
        "...X",
        "...."
    },
    {
        ".XX.",
        "X...",
        "X...",
        ".XX.",
        "...X",
        "...X",
        ".XX."
    },
    {
        ".XX.",
        "X...",
        "X...",
        ".XX.",
        "X..X",
        "X..X",
        ".XX."
    },
    {
        ".XX.",
        "...X",
        "...X",
        "....",
        "...X",
        "...X",
        "...."
    },
    {
        ".XX.",
        "X..X",
        "X..X",
        ".XX.",
        "X..X",
        "X..X",
        ".XX."
    },
    {
        ".XX.",
        "X..X",
        "X..X",
        ".XX.",
        "...X",
        "...X",
        ".XX."
    },
};

const int maxt=24*60;
int n;
char a[105][10][25];

int ok[10][25][3];

bool all0[10][25];
bool all1[10][25];
bool alleq[10][25];

char target[10][25];

bool check(int st){
    for (int i=0;i<7;i++){
        for (int j=0;j<21;j++){
            all0[i][j]=1;
            all1[i][j]=1;
            alleq[i][j]=1;
        }
    }
    for (int len=0;len<n;len++){
        int nowt=(st+len)%maxt;
        int h=nowt/60;
        int mi=nowt%60;

        int A=h/10;
        int B=h%10;
        int C=mi/10;
        int D=mi%10;

        for (int i=0;i<7;i++)
            for (int j=0;j<21;j++) target[i][j]='.';
		if (A!=0){
        	for (int i=0;i<7;i++){
            	for (int j=0;j<4;j++){
                	target[i][j]=digit[A][i][j];
            	}
        	}
		}
        for (int i=0;i<7;i++){
            for (int j=0;j<4;j++){
                target[i][j+5]=digit[B][i][j];
            }
        }
        target[2][10]='X';
        target[4][10]='X';
        for (int i=0;i<7;i++){
            for (int j=0;j<4;j++){
                target[i][j+12]=digit[C][i][j];
            }
        }
        for (int i=0;i<7;i++){
            for (int j=0;j<4;j++){
                target[i][j+17]=digit[D][i][j];
            }
        }
        for (int i=0;i<7;i++){
            for (int j=0;j<21;j++){
                if (a[len][i][j]!='.') all0[i][j]=0;
                if (a[len][i][j]!='X') all1[i][j]=0;
                if (a[len][i][j]!=target[i][j]) alleq[i][j]=0;
            }
        }
		// if (st==58){
		// 	cerr << "len : " << len << endl;
		// 	for (int i=0;i<7;i++){
		// 		for (int j=0;j<21;j++){
		// 			cerr << target[i][j];
		// 		}
		// 		cerr << endl;
		// 	}
		// 	cerr << endl;
		// }
    }
    for (int i=0;i<7;i++){
        for (int j=0;j<21;j++){
            if (!all0[i][j] && !all1[i][j] && !alleq[i][j]) return false;
        }
    }
    for (int i=0;i<7;i++){
        for (int j=0;j<21;j++){
            ok[i][j][0]+=all0[i][j];
            ok[i][j][1]+=all1[i][j];
            ok[i][j][2]+=alleq[i][j];
        }
    }
    return true;
}

char vis[7][22]={
	".XX...XX.....XX...XX.",
	"X..X.X..X...X..X.X..X",
	"X..X.X..X.X.X..X.X..X",
	".XX...XX.....XX...XX.",
	"X..X.X..X.X.X..X.X..X",
	"X..X.X..X...X..X.X..X",
	".XX...XX.....XX...XX.",
};

int main(){
    ios_base::sync_with_stdio(false);
    cin >> n;
    for (int i=0;i<n;i++){
        string str;
        for (int j=0;j<7;j++){
            cin >> str;
            for (int k=0;k<21;k++) a[i][j][k]=str[k];
        }
    }
    int cnt=0;
    for (int tm=0;tm<maxt;tm++){
        if (check(tm)){
			cnt++;
			// cerr << "tm : " << endl;
			// cerr << "h,mi : " << tm/60 << " " << tm%60 << endl;
		}
    }
    if (cnt==0){
        cout << "impossible" << "\n";
        return 0;
    }
	for (int i=0;i<7;i++){
		for (int j=0;j<21;j++){
			if (vis[i][j]=='.'){
				cout << ".";
				continue;
			}
			int cc=0;
			if (ok[i][j][0]>0) cc++;
			if (ok[i][j][1]>0) cc++;
			if (ok[i][j][2]>0) cc++;
			if (cc!=1) cout << "?";
			else{
				if (ok[i][j][0]>0) cout << "0";
				else if (ok[i][j][1]>0) cout << "1";
				else if (ok[i][j][2]>0) cout << "W";
			}
		}
		cout << "\n";
	}
    return 0;
}