#include <bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
#define int ll
using namespace std;
using ll = long long;
const ll N = 2e5+5 , inf = 2e9+7;
const ll INF = 1e18 , mod = 987654321;
vector<int> a[N];
void solve(){
int n , m , k;
cin >> n >> m >> k;
for(int i = 0; i <= n; i++){
a[i].resize(m+9);
}
if((n/2)*(m/2) < k) {
cout << "NO\n";
} else {
cout << "YES\n";
int cur = 1;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
a[i][j] = 0;
}
}
for(int i = 1; i <= n; i+=2){
for(int j = 1; j <= m; j+=2){
if(cur == k) continue;
if(j+1 > m){
a[i][j] = a[i][j-1];
a[i+1][j] = a[i+1][j-1];
} else {
a[i][j] = a[i+1][j] = a[i][j+1] = a[i+1][j+1] = ++cur;
}
}
}
for(int j = 1; j <= m; j++){
a[n][j] = a[n-1][j];
}
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
if(a[i][j] == 0){
a[i][j] = 1;
}
cout << a[i][j] <<" ";
}
cout << "\n";
}
}
}
/*
*/
signed main(){
ios;
int t;
cin >> t;
while(t--) solve();
}
