Hi there! I understand you're having trouble entering letters for the solution in the Zen Word app on your iPhone. Just to clarify, when you try to input letters, nothing happens, or do you hear a sound but the letters don't appear? Also, are you using any special keyboard settings or accessibility features that might affect touch input?

A common point for Zen Word is that to enter words, you don't just tap individual letters — instead, you need to drag your finger across the letters to form the word (like swiping from one letter to the next) rather than tapping them one by one. Have you tried this drag-and-connect method?

If you have tried dragging and it still doesn't work, here are some steps you can try:

1. Restart the Zen Word app: Close it completely from the app switcher and relaunch.

2. Restart your iPhone: Sometimes a fresh start clears up small glitches.

3. Check for app updates: Go to the App Store and verify if there's an update for Zen Word.

4. Reinstall the app: If restarting doesn't help, delete the app and reinstall it. This can clear any corrupted data.

5. Check screen sensitivity/settings: Go to Settings > Accessibility > Touch and see if any settings might affect gestures.

If the problem persists after these steps, it might be an app-specific bug. In that case, please let me know, and I can guide you through contacting Zen Word support or check if there's a known issue with iOS 18.5.

Does any of this align with what you've tried or observed? I'd be happy to help you step by step!