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print "Hello John, Goodbye John" =~ /Hello (John), Goodbye ($1)/;
print ", ";
print "Hello May, Goodbye May" =~ /Hello (\w+), Goodbye ($1)/;
print ", ";
print "Hello May, Goodbye John" =~ /Hello (\w+), Goodbye ($1)/;
Success #stdin #stdout 0s 4552KB
stdin
Standard input is empty
stdout
John, , MayJohn