Сравнение постов

${execp cal | sed -e "s/[0-9]/\$\{color purple\}&\$\{color grey\}/11" -e "s/[0-9]/\$\{color purple\}&\$\{color grey\}/12" -e "s/[0-9]/\$\{color purple\}&\$\{color grey\}/13" -e "s/[0-9]/\$\{color purple\}&\$\{color grey\}/14"}