Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Yard Name | Location (City, State) | 1st Ship Delivery Date | Ship Types Delivered | Total Number of Ways |
| --- | --- | --- | --- | --- |
| Cargill Inc. | Savage, Minnesota | November 1941 | T1 type | number |
| Leatham D. Smith Shipbuilding Co. | Sturgeon Bay, Wisconsin | November 1942 | C1-M type, N3 type, S2 (frigate) type | number |
| Walter Butler Shipbuilders | Superior, Wisconsin | December 1942 | C1-M type, N3 type, S2 (frigate) type | number |
| Froemming Brothers | Milwaukee, Wisconsin | April 1943 | C1-M type, V4 type, S2 (frigate) type | number |
| American Shipbuilding | Lorain, Ohio | May 1943 | L6 type, S2 (frigate) type | number |
| Walter Butler Shipbuilders Inc. | Duluth, Minnesota | May 1943 | C1-M type, N3 type, T1 type | number |
| Globe Shipbuilding Co. | Superior, Wisconsin | May 1943 | C1-M type, V4 type, S2 (frigate) type | number |
| Great Lakes Engineering Co. | Ecorse, Michigan | May 1943 | L6 type | number |
| Great Lakes Engineering Co. | Ashtabula, Ohio | May 1943 | L6 type | number |
| American Shipbuilding | Cleveland, Ohio | June 1943 | L6 type, S2 (frigate) type | number |
Question:
What ship types were first delivered in December 1942?
Answer:
C1-M type, N3 type, S2 (frigate) type