_==0 "exec" "awk" "-f" "$0" "$@"
NR==1{n=$0}
NR==2{split($0,a," ")}
NR==3{split($0,b," ")}
END{for(i=1;i<=n;i++) { if (a[i]!=b[i]) break } printf "%d\n%s\n%s\n",i,a[i],b[i]}