_==0 "exec" "gawk" "-f" "$0"
BEGIN{ PROCINFO["sorted_in"]="@ind_num_asc";m=0;r=0 }
NR>1{ split($0,a," "); for (i in a) h[a[i]]+=1 }
END{ for (i in h) if (m<=h[i]) { m=h[i];r=i } print r }