#include<iostream>#include<stdio.h>using namespace std;int a[ 150 ][ 150 ];int c[ 150 ],d[ 150 ];int ans[ 150 ],tn;int main(){ int T,n,p; int tp,tmax; scanf("%d",&T); while( T-- ) { scanf("%d%d",&n,&p); for(int i=0;i<n;i++) {tp = 1001;tmax = 0;for(int j=0;j<p;j++){ scanf("%d",&a[i][j]); if( a[i][j] < tp )tp = a[i][j]; if( a[i][j] > tmax )tmax = a[i][j];}c[ i ] = tp;d[ i ] = tmax; } tn=0; for(int i=0;i<p;i++) {tp = 0;for(int j=0;j<n;j++){ if( a[ j ][ i ] == c[ j ] )tp++; if( a[ j ][ i ] == d[ j ] ){tp=0;break;}}if( tp > n/2 )ans[ tn++ ] = i+1; } if( tn == 0 )printf("0"); for(int i=0;i<tn;i++) {if( i )printf(" ");printf("%d",ans[i]); } printf("n"); if( T )printf("n"); }}
