def test_1(self):
sol = Solution()
transations = [(12, 'A', ('A', 'B', 'C')), (10, 'B', ('A', 'B'))]
res = sol.get_balance(transations)
print res
def test_2(self):
sol = Solution()
transations = [(12, 'A', ('A', 'B', 'C')), (10, 'B', ('A', 'B'))]
balance_dct = sol.get_balance(transations)
res = sol.get_due(balance_dct)
print res