Cut the fourth and seventh fields (separated by commas) from the file /etc/services, then print only the lines where the second field contains only numbers, sort the output numerically in reverse order based on the second field, and print the first 11 lines.
cut -d, -f 4,7 /etc/services | awk '$2~/^[0-9]/' | sort -rnk2 | head -n 11