3.2 готовая

class C32:
    def __init__(self):
        self.state = 'A'
        self.transitions = {
            'A': {'paint': ('B', 0)},
            'B': {
                'paint': ('F', 2),
                'join': ('C', 1),
            },
            'C': {
                'paint': ('A', 4),
                'join': ('D', 3),
            },
            'D': {
                'roam': ('D', 6),
                'join': ('E', 5)
            },
            'E': {
                'roam': ('F', 7),
                'paint': ('E', 8)
            },
            'F': {}
        }

    def roam(self):
        self.goto_next('roam')

    def paint(self):
        self.goto_next('paint')

    def join(self):
        self.goto_next('join')

    def goto_next(self, command):
        transition = self.transitions[self.state].get(command, None)
        if transition is not None:
            self.state = transition[0]
            print(transition[1])
        else:
            raise RuntimeError('Error!')


def main():
    o = C32()
    o.paint()
    o.join()
    o.paint()
    o.paint()
    o.join()
    o.join()
    o.roam()
    o.join()
    o.paint()
    o.roam()


if __name__ == '__main__':
    main()