Python3 听取wa声一片 求教

nums = []
t    = input()
nums = t.split('-')
del t
strs = nums[0] + nums[1] + nums[2]
a = 1
for i in range(len(strs)):
    a *= int(strs[i])

if a % 11 == nums[3]:
    print('Right')
else:
    print(str(a % 11))