#include <stdio.h>
#include <string.h>
int main()
{
char greeting[]="\nHello World!\n";
int a;
int len = strlen(greeting);
for(int i=0; i<len; i++)
greeting[i]^=111;
for(int i=0; i<len; i++)
greeting[i]^=111;
printf("%s\n",greeting);
scanf("%d",&a);
}
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