RT
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int n , m , k ;
int a[105][105] ;
bool b[105][105][105] ;
int main()
{
// freopen(".in","r",stdin);
// freopen(".out","w",stdout);
cin >> n >> m >> k ;
for ( int i = 1 ; i <= n ; i ++ ) {
for ( int j = 1 ; j <= m ; j ++ ) {
cin >> a[i][j] ;
}
}
b[1][1][a[1][1]%k]=1;
for ( int i = 1 ; i <= n ; i ++ ) {
for ( int j = 1 ; j <= m ; j ++ ) {
for ( int l = 0 ; l < k ; l ++ ) {
if(b[i][j][l])
b[i+1][j][(l*a[i][j])%k] = b[i][j+1][(l*a[i][j])%k] = 1 ;
}
}
}
int ans = 0 ;
for ( int i = 0 ; i < k ; i ++ ) {
if(b[n][m][i])ans++;
}
cout <<ans << endl ;
for ( int i = 0 ; i < k ; i ++) {
if(b[n][m][i])cout << i << ' ' ;
}
return 0;
}