#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("bemo.in");
ofstream fout("bemo.out");

const short NMAX = 1500;
int a[NMAX+5][NMAX+5];
short n, m;

bool valid(short i, short j)
{
    return i >= 1 && i <= n && j >= 1 && j <= m;
}

int main()
{
    short l = 1, c = 1;
    fin>>n>>m;

    for (short i = 1; i <= n; i++)
        for (short j = 1; j <= m; j++) fin>>a[i][j];

    fout<<a[1][1];

    while (l <= n && c <= m)
        if (valid(l+1, c))
            if (valid(l, c+1))
                if (a[l+1][c] < a[l][c+1]) fout<<' '<<a[l+1][c], l++;
                else fout<<' '<<a[l][c+1], c++;
            else fout<<' '<<a[l+1][c], l++;
        else if (valid(l, c+1)) fout<<' '<<a[l][c+1], c++;
        else break;

    return 0;
}