a,b,c,d =input().split("-") num = ''.join([a,b,c]) sum = 0 j=1 for i in num: sum += int(i)*j j += 1 if sum % 11 == 10: s = "X" else: s = str(sum % 11) if s == d: print("Right") else: print("-".join([a,b,c,s]))