Map each character of the first set to the corresponding character of the second set

Translate characters: run replacements based on single characters and character sets.
More information: <https://www.gnu.org/software/coreutils/tr>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

tr '{{abcd}}' '{{jkmn}}' < {{filename}}

click the source code to copy install tr on any operating system with command-not-found.com