#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<assert.h>

#define EPS 1e-13

int main(){
  int T;

  scanf("%d",&T);
  while(T--){
    int i,j,k,mn,ind;
    
    int N, M, C[200], P[200][200];
    int use[200] = {}, res_size = 0, res_cost = 0;

    double alive_rate[200];

    scanf("%d%d",&N,&M);
    for(i=0; i<M; i++) scanf("%d", C+i);
    for(i=0; i<N; i++) for(j=0; j<M; j++) scanf("%d", P[i]+j);

    for(i=0; i<N; i++) alive_rate[i] = 1;

    for(i=0; i<N; i++){
      while(alive_rate[i] > 0.1+EPS){
        mn = 100000000; ind = -1;
        for(j=0; j<M; j++) if(!use[j] && alive_rate[i]*(100-P[i][j])/100.0 < 0.1+EPS){
          if(mn > C[j]) mn = C[j], ind = j;
        }
        if(ind >= 0){
          use[ind] = 1;
          for(k=0; k<N; k++) alive_rate[k] *= (100-P[k][ind]) / 100.0;
          continue;
        }

        mn = 0;
        for(j=0; j<M; j++) if(!use[j]){
          if(mn < P[i][j]) mn = P[i][j], ind = j;
        }
        if(ind >= 0){
          use[ind] = 1;
          for(k=0; k<N; k++) alive_rate[k] *= (100-P[k][ind]) / 100.0;
          continue;
        }

        assert(0);
      }
    }
    
    res_size = 0;
    for(i=0; i<M; i++) if(use[i]) res_size++;

    k = 0;
    printf("%d\n",res_size);
    for(i=0; i<M; i++) if(use[i]) {
      if(k) putchar(' '); else k = 1;
      printf("%d",i+1);
    }
    puts("");

    /* printf("cost is %d\n",res_cost); */
  }

  return 0;
}