accept I as a first input

src/kyupy/techlib.py

@@ -47,7 +47,7 @@ class TechLib:
                                     ('SDFF', ('RSTB',), 4),
                                     ('SDFF', ('SETB',), 5)]:
             if kind.startswith(prefix) and pin in pins: return index
-        for index, pins in enumerate([('A1', 'IN1', 'A', 'S', 'INP', 'Q', 'QN', 'Y', 'Z', 'ZN'),
+        for index, pins in enumerate([('A1', 'IN1', 'A', 'S', 'INP', 'I', 'Q', 'QN', 'Y', 'Z', 'ZN'),
                                       ('A2', 'IN2', 'B', 'CK', 'CLK', 'CO', 'SE'),
                                       ('A3', 'IN3', 'C', 'RN', 'RSTB', 'CI', 'SI'),
                                       ('A4', 'IN4', 'D', 'SN', 'SETB'),