Record Case Detail - VE482 FA2020 (Manuel) - JOJ

This function is in beta test. Please help improve it in the issues here.

 pwd: /out/package
ppid: 34176
   1: WRITELN echo 123 > 1.txt
   2: WRITELN echo 222 > 2.txt
   3: WRITELN echo 321 > 4.txt
   4: WRITELN <1.txt >3.txt cat 2.txt 4.txt
   5: WRITELN cat 1.txt
   6: WRITELN cat 2.txt
   7: WRITELN cat 3.txt
   8: WRITELN cat 4.txt
   9: WRITELN ls
  10: WRITELN exit

Your answer may be identical to the JOJ answer in the first several lines.

However, you will still get Wrong Answer because the complete output may be longer and there might be errors in the future lines.

Please double check your code to solve this problem and try again.

mumsh $ echo 123  >  1.txt
mumsh $ echo 222  >  2.txt
mumsh $ echo 321  >  4.txt
mumsh $  < 1.txt  > 3.txt cat 2.txt 4.txt
mumsh $ 123
cat 1.txt
mumsh $ 222
cat 2.txt
mumsh $ 222
321
cat 3.txt
mumsh $ 321
cat 4.txt
mumsh $ 1.txt
2.txt
3.txt
4.txt
driver
mumsh
mumsh_memory_check
ls
mumsh $ exit
exit

mumsh $ mumsh $ mumsh $ mumsh $ mumsh $ 123
mumsh $ 222
mumsh $ 222
321
mumsh $ 321
mumsh $ 1.txt
2.txt
3.txt
4.txt
driver
mumsh
mumsh_memory_check
mumsh $ exit