Do we like this way of representing the NSEC to facilitate handwritten backup and typing back into the app?
```
NSEC1-AGZ4-Q7LG-WN8V-4K5M
FA4KT-YK8G-VY0R-AHV2-CPL2
KJQ6M-SP8X-PZV2-PQX7-8ZKF
Invalid key
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No, actually it works... I'm using it.
