jshell> "πfs".toUpperCase() $1 ==> "ΠFS" Welcome to Node.js v26.3.0. Type ".help" for more information. > "πfs".toUpperCase() 'ΠFS' Py

jshell> "πfs".toUpperCase() $1 ==> "ΠFS" Welcome to Node.js v26.3.0. Type ".help" for more information. > "πfs".toUpperCase() 'ΠFS' Python 3.14.5 (main, May 10 2026, 10:21:34) [Clang 21.0.0 (clang-2100.0.123.102)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> "πfs".upper() 'ΠFS' echo 'πfs' | awk '{print toupper($0)}' ΠFS