keen

@echo off&setlocal enabledelayedexpansion
set "code=19#3 1#3 50#2 $ 1#0 3#3 20#3 $ 3#5 20#3 1#1 2#1"
for /f "skip=1" %%i in ('help') do set /a n+=1&set "_!n!=%%i"
for %%a in (%code%) do (
    for /f "tokens=1,2 delims=#" %%i in ("%%a") do (
        if "%%i" equ "$" (
           set /p= <nul
           ) else (
           set "str=!_%%i!"
           set /p=!str:~%%j,1!<nul
           )
     )
)
pause>nul
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结果：
YOU ARE BEST