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:
| Type of unit | Type of aircraft | Number of aircraft | Number of crews | Men per crew | Total personnel | Officers | Enlisted |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Very heavy bombardment group | B-29 | 45 | 60 | 11 | 2078.0 | 462.0 | 1816.0 |
| Heavy bombardment group | B-17 , B-24 | 72 | 96 | 9 to 11 | 2261.0 | 465.0 | 1796.0 |
| Medium bombardment group | B-25 , B-26 | 96 | 96 | 5 or 6 | 1759.0 | 393.0 | 1386.0 |
| Light bombardment group | A-20 , A-26 | 96 | 96 | 3 or 4 | 1304.0 | 211.0 | 1093.0 |
| Single-engine fighter group | P-40 , P-47 P-51 | 111 to 126 | 108 to 126 | 1 | 994.0 | 183.0 | 811.0 |
| Twin-engine fighter group | P-38 | 111 to 126 | 108 to 126 | 1 | 1081.0 | 183.0 | 838.0 |
| Troop carrier group | C-47 | 80 - 110 | 128 | 4 or 5 | 1837.0 | 514.0 | 1323.0 |
| Combat cargo group | C-46 , C-47 | 125 | 150 | 4 | 883.0 | 350.0 | 533.0 |
| Night fighter squadron | P-61 , P-70 | 18 | 16 | 2 or 3 | 288.0 | 50.0 | 238.0 |
| Tactical reconnaissance squadron | F-6 , P-40 L-4 , L-5 | 27 | 23 | 1 | 233.0 | 39.0 | 194.0 |
| Photo reconnaissance squadron | F-5 | 24 | 21 | 1 | 347.0 | 50.0 | 297.0 |
Question:
What is the aircraft for 21 crews?
Answer:
F-5