Python two dictionaries

Phenomena and background of the problem

I have two dictionaries, I want to traverse and query whether the value of dic is in dic1, if not, return the value that is not in this part

Problem related code, please do not paste screenshot

dic={'0': 'rm-pz5l62z7h7p7v4ocj', '1': 'rm-pz5irvp287ha32ecu', '2': 'rm-pz5049z6gvl6hoo7d', '3': 'rm-pz5049z6gvl6hoo9d'}
dic1={1: ('a', 'rm-pz5l62z7h7p7v4ocj', 46048, 'Physical'), 2: ('a', 'rm-pz5irvp287ha32ecu', 3824, 'Physical'), 3: ('a', 'rm-pz5049z6gvl6hoo7d', 11632, 'Physical') }

My desired outcome

The final return should be this
dic2={'rm-pz5049z6gvl6hoo9d'}