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/* This is a valid comment */
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
(Another valid comment)
*/
/*
if (gwb == 0) { // single line comment is OK inside a multi-line comment
x = 3; /* but not another multi-line comment - this is invalid */
}
// don't forget the "closing" comment - they have to be balanced!
*/