| Step 1 |
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| Opening A |
| Step 2 |
 |
| SP(trob,2,tubum) |
| Step 3 |
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| Proximally, insert 543 into 2 loops and hook down 2f. Distally, insert 2 into distal and proximal 1 loops, hook up both 1n and return. |
| ... |
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| Release 543 and extend. |
| Step 4 |
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| 5 pick up the transverse 1n. Release 1. |
| Step 5 |
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| 1 pick up the transverse 2n. Release 2 and extend. |
| Step 6 |
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| Distally, insert 2 into 5 loops and hook up 5n. Release 1 and extend. |
| Final figure of 27. Tubum |
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