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

int a[10], n;
int ten[] = {1, 10, 100, 1000, 10000, 11, 110, 1100, 11000};

bool check(int x, int y) {
    int z = 0, a, b;
    int cnt = 0;
    z = abs(x - y);
    for (int i = 0; i < 5; i++) {
        a = x % 10, b = y % 10;
        x /= 10, y /= 10;
        if(a != b) cnt += ten[i];
        if(z % 10 == 0) z /= 10;
    }
    bool ok = true;
    for(int i = 0; i < 9; i++) if(ten[i] != cnt) ok = false;
    if(!ok) return false;
    if(z > 0 && cnt == 1) return true;
    if(z > 99) return false;
    return z % 11 == 0;
}

bool check(int x) {
    for (int i = 0; i < n; i++) {
        if(!check(a[i], x)) return false;
    }
    return true;    
}

int getIn() {
    int res = 0, t;
    for (int i = 0; i < 5; i++) {
        scanf("%d",&t);
        res = res * 10 + t;
    }
    return res;
}

int main() {
    scanf("%d",&n);
    for (int i = 0; i < n; i++) {
        a[i] = getIn();
    }
    int ans = 0;
    for (int i = 0; i < 100000; i++) {
        if(check(i)) {
            printf("%05d\n",i);
            ans++;
        }
    }
    printf("%d",ans);
    return 0;
}