Is it too obvious?

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#include<stdio.h>
int main() {
    printf("Huh??!");
    return 0;
}

If the above C code snippet is compiled strictly according to a C standard and executed, what would the output be?

Here 's a text file that contains 8 lines and in each line, there's a number followed by a string. If you think the string on the line with number $x$ is the output of the above code, give your answer as $x$ .

Details and Assumptions:

• As an example, if you think the output is "Huh?!", give your answer as $5$ .
• Compiling strictly according to a C standard refers to compiling according to a C standard (for example, C99, C11, etc) instead of some non-standard C revision like GNU99, GNU11, etc.