#include <iostream>
#include <cstring>
using namespace std;

int main(void) {
    
    int n, m;
    string s[201][6];
    scanf("%d%d", &n, &m);
    for (int i=0; i<n; ++i) 
    for (int j=0; j<5; ++j) cin >> s[i][j];
        
    printf("%d\n", -1);
    
    // system("PAUSE");
    return 0;    
}