s=input()

r=s.replace('-', '')
t=0
for indx, i in enumerate(r[:-1]):
    t+=int(i)*(indx+1)
rcode=t%11
rcode = 'X' if rcode==10 else str(rcode)
if rcode==r[-1]:
    print('Right')
else:
    print(s[:-1]+str(rcode))