n = input() a = n.replace('-', '') b = 0 for i in range(len(a)-1): b += int(a[i]) * (i+1) c = b % 11 if c == 10: c = 'X' if str(c) == a[-1]: print('Right') else: c = n[-6:-1] + str(c) print(n.replace(n[-6:], c))