<wob_jonas> slashlearn napkin/A complement of small lemon-soaked paper napkins is essential for the comfort, refreshment, and hygiene of the passengers during the journey.

#!/bin/bash
declare {{a..h},{j..t}}="$((i++))" letters=({{a..h},{j..t}}); while read -r; do echo "${letters[18-${REPLY:0:1}]}$((20-${REPLY:1}))"; done