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3.

#include <stdio.h>

int main() 
{
    // Print a line of hashes
    printf("######\n");

    // Print a single hash
    printf("#\n");

    // Print a single hash
    printf("#\n");

    // Print a line of hashes
    printf("#####\n");

    // Print a single hash
    printf("#\n");

    // Print a single hash
    printf("#\n");

    // Print a single hash
    printf("#\n");

    return(0);
}

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