#include <stdio.h>
#include <string.h>

int main()
{
    const char *x = "Hello World!\n";

    for (unsigned int i = 1; i < strlen (x); i++)
    {
	for (unsigned int j = 0; j < i; j++)
	{
	    printf ("%c", x[j]);
	}
	printf ("\n");
    }
}