Here another QOD (Question Of the Day)

Which of the following 5 PRINTL thinBasic statements will print something different?

Uses "Console"

String A = "Hello"
String B = "world"

PrintL A + " " + B
PrintL A . " " . B
PrintL A, B
PrintL EXPAND$("$A $B")
PrintL A & " " & B

WaitKey