<b_jonas> learn Burlesque is only the sexiest language on Earth. mroman created it for finance analysis because the traditionally used K and Dyalog APL are unreadable. (See: http://mroman.ch/burlesque )

`4 <cmd> is equivalent to `5 <cmd>, except that it only repeats 4 times. Useful when you've already run a command forgetting to use `5.