<oerjan> addquote <shachaf> int-e does not like this [...] <int-e> shachaf: I experience heightened levels of indifference :P <shachaf> Higher than your usual? <int-e> who cares?

#!/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