010 REM 
020 REM See ../README.md
030 REM 

040 REM 
050 REM Run as: basic ch-1.bas
060 REM 

100 PRINT "0, 0, 0, 2, 0, 5, 0, 6, 3, 7, 0, 15, 0, 9, 8, 14, 0, 20, 0, 21"