char dabuf[20];
bool stop=false;

void increment(int cur,char *pointer)
{
	if(cur==20)
	{
		stop=true;
		return;
	}
	if(pointer[0]==0)
	{
		pointer[0]='a';
		return;
	}
	if(pointer[0]=='z')
	{
		pointer[0]='A';
		return;
	}
	if(pointer[0]=='Z')
	{
		pointer[0]='0';
	}
	if(pointer[0]=='9')
	{
		pointer[0]='a';
		increment(cur+1,pointer+1);
		return;
	}
	pointer[0]++;
}

void check(char *dastring)
{
	long index;
	long result=0;
	for(index=0;index<strlen(dastring);index++)
	{
		result+=dastring[index];
	}
	result+=0x96;
	if(result==0x21A)
	{
		printf("Valid: %s\n", dastring);
	}
}

int main(int argc, char *argv[])
{
	memset(dabuf,0,20);
	
	while(stop==false)
	{
		check(dabuf);
		increment(0,dabuf);
	}

    return EXIT_SUCCESS;
}