include <stdio.h>

int main(void) { int i, m=1, n=0; char isbn[14],mod[12] = "0123456789X"; scanf("%s", isbn);

for (i = 0; i < 12; i++)
{
	
		if (isbn[i] != '-')
		{
			n += (isbn[i] - '0') * m;
			m++;
		}
	
}
n = n % 11;
if (n == isbn[13])
	printf("Right");
else
{   
	isbn[12] = mod[n % 11];
	printf("%s", isbn);
}

return 0;

}